Verlagsgruppe Droemer Knaur GmbH & Co. KG Company CyberSecurity Posture
droemer-knaur.de
Die Verlagsgruppe Droemer Knaur mit Sitz in München ist Teil der renommierten Holtzbrinck Publishing Group. Unser vielfältiges Programm reicht von fesselnder Belletristik und populärer Unterhaltungsliteratur bis hin zu aktuellen Sachbüchern und kreativen Geschenkbüchern. Unser Ziel ist es, vielfältige und qualitativ hochwertige Inhalte zu vermitteln und den Leser*innen dabei immer wieder neue Perspektiven zu bieten.
Company Details
verlagsgruppe-droemer-knaur-gmbh-&-co-kg
137
4,146
511
droemer-knaur.de
0
VER_3766433
In-progress
VDKGCK Risk Score (AI oriented)Between 750 and 799
VDKGCK Global Score (TPRM)XXXX
Description: A hacking attack has been launched against an IT service provider for Holtzbrinck book publishers. It was already widely known about the hacker attack. All external connections were severed as a safety measure. All systems have been reviewed, and there is no evidence of data leakage—not even from clients or business partners. The publishing company acknowledged that there can occasionally be delivery difficulties and delays for clients as a result of this occurrence.
Description: Macmillan suffered a data breach after an unauthorized party was able to bypass its data security system and gain access to sensitive consumer information on the company’s computer system. The breach compromised the consumer names, addresses, Social Security numbers, driver’s license numbers and financial account information of about 1,193 victims. Macmillan took all affected servers offline and began investigating the incident and sent out data breach letters to all affected parties.
Description: The Vermont Office of the Attorney General reported a data breach involving Macmillan on December 1, 2022. The breach occurred between June 16, 2022, and June 25, 2022, affecting an unspecified number of individuals and potentially compromising personal information including names. Macmillan has offered twenty-four months of complimentary credit monitoring services through Experian as a response.
Description: Publishing giant Macmillan fell victim to a ransomware attack which forced it to shut down its network and offices while recovering from a security incident. The attack involved the encryption of certain files on our network after which agents and clients that they have lost access to their systems, emails, and files. The company shut down all of its IT systems to prevent the spread of the attack and investigated the incident and restored the systems.
No incidents recorded for Verlagsgruppe Droemer Knaur GmbH & Co. KG in 2025.
No incidents recorded for Verlagsgruppe Droemer Knaur GmbH & Co. KG in 2025.
No incidents recorded for Verlagsgruppe Droemer Knaur GmbH & Co. KG in 2025.
VDKGCK cyber incidents detection timeline including parent company and subsidiaries
Die Verlagsgruppe Droemer Knaur mit Sitz in München ist Teil der renommierten Holtzbrinck Publishing Group. Unser vielfältiges Programm reicht von fesselnder Belletristik und populärer Unterhaltungsliteratur bis hin zu aktuellen Sachbüchern und kreativen Geschenkbüchern. Unser Ziel ist es, vielfältige und qualitativ hochwertige Inhalte zu vermitteln und den Leser*innen dabei immer wieder neue Perspektiven zu bieten.
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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Verlagsgruppe Droemer Knaur GmbH & Co. KG is http://www.droemer-knaur.de.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG’s AI-generated cybersecurity score is 752, reflecting their Fair security posture.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG is not certified under SOC 2 Type 1.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG is not listed as GDPR compliant.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG does not currently maintain PCI DSS compliance.
According to Rankiteo, Verlagsgruppe Droemer Knaur GmbH & Co. KG is not compliant with HIPAA regulations.
According to Rankiteo,Verlagsgruppe Droemer Knaur GmbH & Co. KG is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Verlagsgruppe Droemer Knaur GmbH & Co. KG operates primarily in the Book and Periodical Publishing industry.
Verlagsgruppe Droemer Knaur GmbH & Co. KG employs approximately 137 people worldwide.
Verlagsgruppe Droemer Knaur GmbH & Co. KG presently has no subsidiaries across any sectors.
Verlagsgruppe Droemer Knaur GmbH & Co. KG’s official LinkedIn profile has approximately 4,146 followers.
Verlagsgruppe Droemer Knaur GmbH & Co. KG is classified under the NAICS code 511, which corresponds to Publishing Industries (except Internet).
No, Verlagsgruppe Droemer Knaur GmbH & Co. KG does not have a profile on Crunchbase.
Yes, Verlagsgruppe Droemer Knaur GmbH & Co. KG maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/verlagsgruppe-droemer-knaur-gmbh-&-co-kg.
As of November 28, 2025, Rankiteo reports that Verlagsgruppe Droemer Knaur GmbH & Co. KG has experienced 4 cybersecurity incidents.
Verlagsgruppe Droemer Knaur GmbH & Co. KG has an estimated 4,881 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Breach, Cyber Attack and Ransomware.
Detection and Response: The company detects and responds to cybersecurity incidents through an containment measures with shut down all it systems, and remediation measures with investigated the incident, remediation measures with restored the systems, and containment measures with took all affected servers offline, and communication strategy with sent out data breach letters to all affected parties, and containment measures with severed all external connections, and communication strategy with acknowledged delivery difficulties and delays, and third party assistance with experian, and remediation measures with complimentary credit monitoring services..
Title: Macmillan Ransomware Attack
Description: Publishing giant Macmillan fell victim to a ransomware attack which forced it to shut down its network and offices while recovering from a security incident. The attack involved the encryption of certain files on our network after which agents and clients that they have lost access to their systems, emails, and files. The company shut down all of its IT systems to prevent the spread of the attack and investigated the incident and restored the systems.
Type: Ransomware
Attack Vector: Encryption of files
Title: Macmillan Data Breach
Description: Macmillan suffered a data breach after an unauthorized party was able to bypass its data security system and gain access to sensitive consumer information on the company’s computer system.
Type: Data Breach
Attack Vector: Unauthorized access to data security system
Threat Actor: Unauthorized party
Title: Hacking Attack on IT Service Provider for Holtzbrinck Book Publishers
Description: A hacking attack has been launched against an IT service provider for Holtzbrinck book publishers. All external connections were severed as a safety measure. All systems have been reviewed, and there is no evidence of data leakage—not even from clients or business partners. The publishing company acknowledged that there can occasionally be delivery difficulties and delays for clients as a result of this occurrence.
Type: Hacking Attack
Title: Macmillan Data Breach
Description: The Vermont Office of the Attorney General reported a data breach involving Macmillan on December 1, 2022. The breach occurred between June 16, 2022, and June 25, 2022, affecting an unspecified number of individuals and potentially compromising personal information including names. Macmillan has offered twenty-four months of complimentary credit monitoring services through Experian as a response.
Date Detected: 2022-12-01
Date Publicly Disclosed: 2022-12-01
Type: Data Breach
Common Attack Types: The most common types of attacks the company has faced is Breach.
Systems Affected: IT systemsemailsfiles
Data Compromised: Consumer names, Addresses, Social security numbers, Driver’s license numbers, Financial account information
Downtime: ['Delivery difficulties and delays for clients']
Operational Impact: Delivery difficulties and delays for clients
Data Compromised: Names
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are Consumer Names, Addresses, Social Security Numbers, Driver’S License Numbers, Financial Account Information, , Personal Information and .
Entity Name: Macmillan
Entity Type: Publishing Company
Industry: Publishing
Customers Affected: agents, clients
Entity Name: Macmillan
Entity Type: Company
Industry: Publishing
Customers Affected: 1193
Entity Name: Holtzbrinck book publishers
Entity Type: Publishing Company
Industry: Publishing
Containment Measures: Shut down all IT systems
Remediation Measures: Investigated the incidentRestored the systems
Containment Measures: Took all affected servers offline
Communication Strategy: Sent out data breach letters to all affected parties
Containment Measures: Severed all external connections
Communication Strategy: Acknowledged delivery difficulties and delays
Third Party Assistance: Experian.
Remediation Measures: Complimentary credit monitoring services
Third-Party Assistance: The company involves third-party assistance in incident response through Experian, .
Data Encryption: Certain files on the network
Type of Data Compromised: Consumer names, Addresses, Social security numbers, Driver’s license numbers, Financial account information
Number of Records Exposed: 1193
Sensitivity of Data: High
Type of Data Compromised: Personal information
Personally Identifiable Information: names
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: Investigated the incident, Restored the systems, , Complimentary credit monitoring services, .
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by shut down all it systems, , took all affected servers offline, , severed all external connections and .
Data Encryption: Certain files on the network
Source: Vermont Office of the Attorney General
Date Accessed: 2022-12-01
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Vermont Office of the Attorney GeneralDate Accessed: 2022-12-01.
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Sent Out Data Breach Letters To All Affected Parties and Acknowledged Delivery Difficulties And Delays.
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Experian, .
Last Attacking Group: The attacking group in the last incident was an Unauthorized party.
Most Recent Incident Detected: The most recent incident detected was on 2022-12-01.
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2022-12-01.
Most Significant Data Compromised: The most significant data compromised in an incident were Consumer names, Addresses, Social Security numbers, Driver’s license numbers, Financial account information, , names and .
Most Significant System Affected: The most significant system affected in an incident was IT systemsemailsfiles.
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was experian, .
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident were Shut down all IT systems, Took all affected servers offline and Severed all external connections.
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were Addresses, Driver’s license numbers, names, Social Security numbers, Consumer names and Financial account information.
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 122.0.
Most Recent Source: The most recent source of information about an incident is Vermont Office of the Attorney General.
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ThingsBoard in versions prior to v4.2.1 allows an authenticated user to upload malicious SVG images via the "Image Gallery", leading to a Stored Cross-Site Scripting (XSS) vulnerability. The exploit can be triggered when any user accesses the public API endpoint of the malicious SVG images, or if the malicious images are embedded in an `iframe` element, during a widget creation, deployed to any page of the platform (e.g., dashboards), and accessed during normal operations. The vulnerability resides in the `ImageController`, which fails to restrict the execution of JavaScript code when an image is loaded by the user's browser. This vulnerability can lead to the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and allowing unauthorized actions.
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
Exposure of email service credentials to users without administrative rights in Devolutions Server.This issue affects Devolutions Server: before 2025.2.21, before 2025.3.9.
Exposure of credentials in unintended requests in Devolutions Server.This issue affects Server: through 2025.2.20, through 2025.3.8.
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