CVE-2006-6421
6.0 · MEDIUMCross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the "Mes…
Overview
CVE-2006-6421 is a medium-severity vulnerability affecting phpbb_group phpbb. It was published on December 10, 2006 and has a CVSS 2.0 base score of 6.0 (MEDIUM).
This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical description
Cross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the "Message body" field in a message to a non-existent user.
Remediation
Check the references section for vendor advisories and patches from phpbb_group. Update phpbb to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
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References
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Frequently asked questions
What is CVE-2006-6421?
CVE-2006-6421 is a medium-severity vulnerability affecting phpbb_group phpbb. It was published on December 10, 2006 and has a CVSS 2.0 base score of 6.0 (MEDIUM).
How severe is CVE-2006-6421?
This vulnerability has a CVSS 2.0 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2006-6421?
Check the references section for vendor advisories and patches from phpbb_group. Update phpbb to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2006-6421?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2006-6421 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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