CVE-2025-70810 is a critical Cross Site Request Forgery (CSRF) vulnerability affecting Phpbb Phpbb3 version 3.3.15. This vulnerability allows local attackers to execute arbitrary code through the login function and authentication mechanism, posing a significant risk to affected systems.
With a CVSS score of 8.8, this vulnerability falls into the high-severity category. The potential for exploitation is concerning, as attackers may leverage this vulnerability to compromise users and systems.
Risk to organizations includes unauthorized access and manipulation of sensitive data, especially since the exploit requires user interaction, making it all the more dangerous. Organizations should prioritize patching immediately.
Currently, there is no public exploit confirmed for this vulnerability, but the impact can be severe if exploited. Security teams are advised to assess their environments and apply the necessary updates.
Vulnerability Details
This vulnerability allows a local attacker to execute arbitrary code via the login function and the authentication mechanism in Phpbb Phpbb3 v.3.3.15. The CVSS score of 8.8 indicates a high severity level, primarily due to the low attack complexity and the high potential impact on confidentiality, integrity, and availability.
The vulnerability was published on April 9, 2026, and is classified under CWE-352, indicating a Cross Site Request Forgery issue. Affected systems include Phpbb version 3.3.15.
Technical Analysis
The root cause of this vulnerability is related to insufficient validation of requests. The attack vector is through the network, requiring low complexity to exploit. No privileges are required for the attacker, although user interaction is necessary for successful exploitation.
The potential impacts are significant, with high confidentiality, integrity, and availability impact if the vulnerability is successfully exploited. Organizations must be vigilant in their security practices to mitigate these risks.
Risk & Impact Analysis
Real-world deployment of this vulnerability could result in significant risks to organizations, particularly those using Phpbb for community forums or user interactions. The potential blast radius includes all users who may be targeted by the attacker, leading to unauthorized access and data manipulation.
Given the CVSS score of 8.8 and the fact that the vulnerability is not included in the KEV (Known Exploited Vulnerabilities) catalog, it is crucial for organizations to assess their exposure and respond accordingly.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version is Phpbb 3.3.15. Organizations using this version should evaluate their systems and apply the necessary patches to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching their Phpbb installations to the latest version available. If an immediate patch is unavailable, temporary workarounds may involve implementing strict input validation and ensuring users are educated about potential phishing attempts.
For further guidance on implementing security measures, organizations can refer to our continuous penetration testing services, which help identify similar vulnerabilities.
Detection Guidance
Organizations should monitor logs for unusual login attempts and cross-site request forgery activity. Behavioral anomalies related to user actions should also be tracked to detect potential exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2025-70810 highlights the importance of securing user authentication mechanisms across web applications. This vulnerability serves as a reminder for organizations to conduct regular security assessments and implement robust security measures.
For more insights into vulnerability management, organizations can explore our vulnerability management program design, which helps establish a proactive security posture.
Additionally, our resources on penetration testing methodology can provide further assistance in identifying and mitigating vulnerabilities.
Finally, organizations should remain vigilant about emerging threats and ensure their application security practices are up to date. Continuous education and awareness are vital in maintaining a secure environment.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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