CVE-2026-24772 is a high-severity vulnerability affecting OpenProject, an open-source web-based project management software. This vulnerability allows attackers to exploit a flaw in the synchronization server introduced in OpenProject version 17.0. The server generates an authentication token that is valid for 24 hours, but a lack of proper validation of the backend URL can lead to serious security risks.
The vulnerability was publicly disclosed on January 28, 2026, and has been assigned a CVSS score of 8.9, indicating a high level of risk. Organizations should act quickly to address this issue, given the potential for unauthorized access to user accounts.
Risk to organizations includes unauthorized interaction with OpenProject on behalf of users, which could lead to data exposure or manipulation. As of now, there are no known exploits in the wild, but the potential for exploitation exists, and organizations should prioritize patching.
Organizations should prioritize patching immediately. The vulnerability was addressed in version 17.0.2, and it is crucial to upgrade to this version or later.
Vulnerability Details
OpenProject's synchronization server, which facilitates real-time collaboration, improperly validates backend URLs, sending decrypted authentication tokens to unauthorized endpoints. This vulnerability allows an attacker to gain access to OpenProject on behalf of a victim by decrypting intercepted tokens.
The vulnerability is classified under CWE-345 and affects all versions from 17.0.0 to 17.0.1, fixed in version 17.0.2. Organizations using affected versions should disable real-time collaboration features until the update can be applied.
Technical Analysis
The root cause of this vulnerability lies in the synchronization server's failure to validate the backend URL correctly. The attack vector is network-based, and the complexity is low, requiring only minimal privileges for exploitation. User interaction is required, as the attacker must intercept the token.
The impacts on confidentiality and integrity are high, indicating that successful exploitation could lead to significant data breaches or unauthorized changes. Availability impact is low, suggesting that the service remains operational despite the vulnerability.
Risk & Impact Analysis
Real-world deployment risks include unauthorized access to sensitive project data and the potential for malicious changes to project plans or documents. This vulnerability represents a significant threat to the integrity of project management processes within organizations.
The potential blast radius is considerable, as multiple users could be affected if an attacker successfully exploits this vulnerability. Given its high CVSS score of 8.9, organizations should assess their exposure and take immediate action to mitigate risks.
The urgency for remediation is high, with organizations needing to schedule updates as a priority to prevent exploitation.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of OpenProject include all versions prior to 17.0.2. Organizations should ensure they upgrade to this version or later to mitigate risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to OpenProject version 17.0.2 or later. If upgrading is not immediately possible, it is recommended to disable the collaboration feature via Settings -> Documents -> Real time collaboration -> Disable. Additionally, the `hocuspocus` container should be disabled.
Organizations can ensure their security posture by implementing continuous security testing practices through continuous penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual access attempts and behavioral anomalies that could indicate exploitation attempts. Network signatures should be established to detect any malicious activity related to this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-24772 lies in the ongoing risk of similar vulnerabilities in synchronization servers that do not properly validate URLs. Security teams should take this as an opportunity to review their authentication and authorization mechanisms.
Organizations can learn from this incident by implementing strict validation processes for any incoming requests that involve sensitive operations. For further insights, security teams can explore our resource on vulnerability management programs and best practices.
Additionally, ongoing education in secure coding practices is essential, particularly for teams involved in developing collaborative features. For more information, consider our guide on penetration testing methodologies to ensure robust security measures.
Lastly, organizations should consider adopting strategies that emphasize offensive security testing to proactively identify and mitigate vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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