A security flaw has been discovered in Dolibarr ERP CRM up to 23.0.2. This vulnerability allows improper verification of cryptographic signatures due to an issue in the function dol_verifyHash within the Online Signature Module. The attack may be performed remotely, and while the complexity of the attack is high, it is stated that exploitability is difficult.
With a CVSS score of 2.9, this vulnerability is classified as low severity. Despite the low score, organizations should remain vigilant as the exploit has been released to the public, potentially increasing the risk of attack. It is important to note that the vendor was contacted early about this disclosure but did not respond.
Risk to organizations includes unauthorized manipulation of cryptographic signatures, which may lead to further attacks if not addressed. Organizations should prioritize monitoring for potential exploitation of this vulnerability.
Organizations should address this vulnerability in their patch management cycle, ensuring that they stay informed about any updates or fixes provided by the vendor.
Vulnerability Details
The vulnerability affects the function dol_verifyHash in the library htdocs/core/lib/security.lib.php of the Online Signature Module in Dolibarr ERP CRM versions up to 23.0.2. It is classified under CWE-345 (Insufficient Verification of Data Authenticity) and CWE-347 (Improper Verification of Cryptographic Signature).
The CVSS 4.0 vector for this vulnerability is CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X, indicating a low severity level with high attack complexity and no required privileges or user interaction.
Published on May 3, 2026, this vulnerability necessitates prompt attention from security teams managing Dolibarr ERP CRM installations.
Technical Analysis
The root cause of this vulnerability stems from the improper verification of cryptographic signatures, which can lead to unauthorized manipulation of data. The attack vector is network-based, allowing adversaries to exploit this vulnerability from remote locations. Additionally, the attack complexity is categorized as high, indicating that the conditions required for successful exploitation are not easily met.
No privileges are required for an attacker to exploit this vulnerability, and no user interaction is necessary, making it particularly concerning for organizations relying on this system. The integrity impact is low, meaning that while data can be manipulated, it may not lead to a complete system compromise.
Risk & Impact Analysis
Real-world deployment risk associated with this vulnerability is moderate, given the complexity of the attack and the low CVSS score. However, attackers may leverage this vulnerability for data manipulation or to launch further attacks, potentially impacting an organization's operations and reputation.
Organizations should assess their exposure and consider the blast radius of potential exploitation, especially if sensitive data is involved. Given the low severity designation, organizations are advised to schedule remediation during their regular patch management cycles.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Dolibarr ERP CRM prior to 23.0.2 are affected by this vulnerability. Organizations should ensure they upgrade to the latest version as part of their security practices.
Mitigation & Remediation
Organizations should prioritize patching this vulnerability as part of their security measures. It is recommended to upgrade to the latest version of Dolibarr ERP CRM which addresses this issue. In cases where immediate patching is not feasible, organizations should consider implementing compensatory controls, such as monitoring network traffic for unusual activity related to signature verification.
For further guidance on how to enhance your security posture, organizations can refer to best practices in penetration testing to validate the effectiveness of their remediation efforts.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for indicators of unusual access patterns or failures related to the dol_verifyHash function. Any behavioral anomalies in how signatures are processed could indicate attempted exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in the potential for attackers to manipulate cryptographic signatures, which can compromise data integrity. This incident highlights the importance of maintaining rigorous security practices surrounding cryptographic operations.
Security teams should consider this vulnerability as a reminder to implement and regularly review cryptographic practices to ensure they remain effective against emerging threats. For more insights on securing applications, organizations can explore our resources on penetration testing methodology and the importance of proactive vulnerability management.
In addition, organizations should stay informed about trends in vulnerabilities such as this one to anticipate and mitigate future risks effectively. Our blog provides ongoing updates and best practices in vulnerability management programs that are essential for a robust security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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