Optionis Group
Company Details
Linkedin ID:
optionis
Website:
Employees number:
324
Number of followers:
7,190
NAICS:
5412
Industry Type:
Homepage:
optionis.co.uk
IP Addresses:
0
Company ID:
OPT_1059409
Scan Status:
In-progress
Optionis Group Company CyberSecurity Posture
optionis.co.uk
The Optionis group are experts in accountancy, employment, tax and professional services to the contractor and SME markets. Operating through several brands including ; SJD Accountancy, Nixon Williams, Parasol, ClearSky Contractor Accounting, Brian Alfred and ClearSky Business. SJD Accountancy is the largest contractor accounting specialist in the UK supporting over 15,000 clients and with offices throughout the UK Nixon Williams has been providing specialist accountancy services to contractors, freelancers, consultants and interim professionals throughout the UK since 1995 Parasol is a professional employment organisation (PEO) and the leading provider of outsourced employment services to the UK’s contingent workforce, the staffing businesses who deal with them and the hirers who rely on their skills and knowledge ClearSky Contractor Accounting, one of the UK's largest accountancy firms, is a specialist provider of hassle-free support and advice to Limited company contractors and freelancers First Freelance specialises in tailored contractor accountancy and support services, with their clients including the antipodean market Brian Alfred is one of the UK’s leading tax rebate specialists, Brian Alfred helps CIS, self-employed and PAYE workers gain maximum tax rebates in just 24 hours ClearSky Business supports SMEs across the UK with expert and affordable accounting, payroll and tax support The Optionis group employs around 700 head office employees across 10 sites around the UK. For more information visit www.optionis.co.uk
Optionis Group A.I CyberSecurity Scoring
Optionis Group Risk Score (AI oriented)Between 700 and 749
Optionis Group
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Optionis Group Global Score (TPRM)XXXX
Optionis Group
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Optionis Group Company CyberSecurity News & History
Past Incidents
1
Attack Types
1
Optionis Group
Breach
Rankiteo Explanation
Attack threatening the organization's existence
Description: The Optionis suffered a huge data breach incident in 2016 in which the hackers dumped the sensitive data on the dark web. The breach exposed consumer details including thousands of email addresses and phone numbers, scanned passports, National Insurance numbers, P60s, bank statements, contracts with the clients, and salaries. Optionis Group immediately launched the investigation with the external cyber security experts and communicated with the clients and consumers affected by the breach.
Optionis Group Company Scoring based on AI Models
Cyber Incidents Likelihood 3 - 6 - 9 months
A.I Risk Score Likelihood 3 - 6 - 9 months
Underwriter Stats for Optionis Group
Incidents vs Accounting Industry Average (This Year)
No incidents recorded for Optionis Group in 2025.
Incidents vs All-Companies Average (This Year)
No incidents recorded for Optionis Group in 2025.
Incident Types Optionis Group vs Accounting Industry Avg (This Year)
No incidents recorded for Optionis Group in 2025.
Incident History — Optionis Group (X = Date, Y = Severity)
Optionis Group cyber incidents detection timeline including parent company and subsidiaries
Optionis Group Company Subsidiaries
The Optionis group are experts in accountancy, employment, tax and professional services to the contractor and SME markets. Operating through several brands including ; SJD Accountancy, Nixon Williams, Parasol, ClearSky Contractor Accounting, Brian Alfred and ClearSky Business. SJD Accountancy is the largest contractor accounting specialist in the UK supporting over 15,000 clients and with offices throughout the UK Nixon Williams has been providing specialist accountancy services to contractors, freelancers, consultants and interim professionals throughout the UK since 1995 Parasol is a professional employment organisation (PEO) and the leading provider of outsourced employment services to the UK’s contingent workforce, the staffing businesses who deal with them and the hirers who rely on their skills and knowledge ClearSky Contractor Accounting, one of the UK's largest accountancy firms, is a specialist provider of hassle-free support and advice to Limited company contractors and freelancers First Freelance specialises in tailored contractor accountancy and support services, with their clients including the antipodean market Brian Alfred is one of the UK’s leading tax rebate specialists, Brian Alfred helps CIS, self-employed and PAYE workers gain maximum tax rebates in just 24 hours ClearSky Business supports SMEs across the UK with expert and affordable accounting, payroll and tax support The Optionis group employs around 700 head office employees across 10 sites around the UK. For more information visit www.optionis.co.uk
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Optionis Group CyberSecurity News
April 30, 2025 07:00 AM
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May 03, 2022 07:00 AM
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February 15, 2022 08:00 AM
Parasol data breach: Frustrated IT contractors dig into the dark web in search of their data
IT contractors are taking it upon themselves to investigate whether their personal data has been compromised in the Parasol umbrella company...
February 14, 2022 08:00 AM
Optionis data breach raises growing questions over company’s security
Optionis Limited is the parent company of numerous companies: some, like Parasol, SJD Accountancy and Nixon Williams, listed under “our...
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
Optionis Group CyberSecurity History Information
Official Website of Optionis Group
The official website of Optionis Group is http://www.optionis.co.uk.
Optionis Group’s AI-Generated Cybersecurity Score
According to Rankiteo, Optionis Group’s AI-generated cybersecurity score is 745, reflecting their Moderate security posture.
How many security badges does Optionis Group’ have ?
According to Rankiteo, Optionis Group currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
Does Optionis Group have SOC 2 Type 1 certification ?
According to Rankiteo, Optionis Group is not certified under SOC 2 Type 1.
Does Optionis Group have SOC 2 Type 2 certification ?
According to Rankiteo, Optionis Group does not hold a SOC 2 Type 2 certification.
Does Optionis Group comply with GDPR ?
According to Rankiteo, Optionis Group is not listed as GDPR compliant.
Does Optionis Group have PCI DSS certification ?
According to Rankiteo, Optionis Group does not currently maintain PCI DSS compliance.
Does Optionis Group comply with HIPAA ?
According to Rankiteo, Optionis Group is not compliant with HIPAA regulations.
Does Optionis Group have ISO 27001 certification ?
According to Rankiteo,Optionis Group is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Industry Classification of Optionis Group
Optionis Group operates primarily in the Accounting industry.
Number of Employees at Optionis Group
Optionis Group employs approximately 324 people worldwide.
Subsidiaries Owned by Optionis Group
Optionis Group presently has no subsidiaries across any sectors.
Optionis Group’s LinkedIn Followers
Optionis Group’s official LinkedIn profile has approximately 7,190 followers.
NAICS Classification of Optionis Group
Optionis Group is classified under the NAICS code 5412, which corresponds to Accounting, Tax Preparation, Bookkeeping, and Payroll Services.
Optionis Group’s Presence on Crunchbase
No, Optionis Group does not have a profile on Crunchbase.
Optionis Group’s Presence on LinkedIn
Yes, Optionis Group maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/optionis.
Cybersecurity Incidents Involving Optionis Group
As of December 24, 2025, Rankiteo reports that Optionis Group has experienced 1 cybersecurity incidents.
Number of Peer and Competitor Companies
Optionis Group has an estimated 9,694 peer or competitor companies worldwide.
What types of cybersecurity incidents have occurred at Optionis Group ?
Incident Types: The types of cybersecurity incidents that have occurred include Breach.
How does Optionis Group detect and respond to cybersecurity incidents ?
Detection and Response: The company detects and responds to cybersecurity incidents through an third party assistance with external cyber security experts, and communication strategy with communicated with the clients and consumers affected by the breach..
Incident Details
Can you provide details on each incident ?
Title: Optionis Data Breach
Description: The Optionis suffered a huge data breach incident in 2016 in which the hackers dumped the sensitive data on the dark web. The breach exposed consumer details including thousands of email addresses and phone numbers, scanned passports, National Insurance numbers, P60s, bank statements, contracts with the clients, and salaries. Optionis Group immediately launched the investigation with the external cyber security experts and communicated with the clients and consumers affected by the breach.
Type: data breach
What are the most common types of attacks the company has faced ?
Common Attack Types: The most common types of attacks the company has faced is Breach.
Impact of the Incidents
What was the impact of each incident ?
Incident : data breach OPT15111522
Data Compromised: Email addresses, Phone numbers, Scanned passports, National insurance numbers, P60s, Bank statements, Contracts with the clients, Salaries
What types of data are most commonly compromised in incidents ?
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Email Addresses, Phone Numbers, Scanned Passports, National Insurance Numbers, P60S, Bank Statements, Contracts With The Clients, Salaries and .
Which entities were affected by each incident ?
Response to the Incidents
What measures were taken in response to each incident ?
Incident : data breach OPT15111522
Third Party Assistance: external cyber security experts
Communication Strategy: communicated with the clients and consumers affected by the breach
How does the company involve third-party assistance in incident response ?
Third-Party Assistance: The company involves third-party assistance in incident response through external cyber security experts.
Data Breach Information
What type of data was compromised in each breach ?
Incident : data breach OPT15111522
Type of Data Compromised: Email addresses, Phone numbers, Scanned passports, National insurance numbers, P60s, Bank statements, Contracts with the clients, Salaries
Sensitivity of Data: high
Data Exfiltration: yes
Personally Identifiable Information: yes
Investigation Status
How does the company communicate the status of incident investigations to stakeholders ?
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through communicated with the clients and consumers affected by the breach.
Post-Incident Analysis
What is the company's process for conducting post-incident analysis ?
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as external cyber security experts.
Additional Questions
Impact of the Incidents
What was the most significant data compromised in an incident ?
Most Significant Data Compromised: The most significant data compromised in an incident were email addresses, phone numbers, scanned passports, National Insurance numbers, P60s, bank statements, contracts with the clients, salaries and .
Response to the Incidents
What third-party assistance was involved in the most recent incident ?
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was external cyber security experts.
Data Breach Information
What was the most sensitive data compromised in a breach ?
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were scanned passports, email addresses, P60s, bank statements, salaries, contracts with the clients, National Insurance numbers and phone numbers.
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Risk Information
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Description
continuwuity is a Matrix homeserver written in Rust. Prior to version 0.5.0, this vulnerability allows a remote, unauthenticated attacker to force the target server to cryptographically sign arbitrary membership events. The flaw exists because the server fails to validate the origin of a signing request, provided the event's state_key is a valid user ID belonging to the target server. This issue has been patched in version 0.5.0. A workaround for this issue involves blocking access to the PUT /_matrix/federation/v2/invite/{roomId}/{eventId} endpoint using the reverse proxy.
Risk Information
cvss4
Base: 9.9
Severity: LOW
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Description
LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3
Risk Information
cvss3
Base: 8.6
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62
- https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcore%401.1.8
- https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3
- https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6
Description
LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.
Risk Information
cvss3
Base: 9.3
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8
- https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6
- https://github.com/langchain-ai/langchain/pull/34455
- https://github.com/langchain-ai/langchain/pull/34458
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm
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