CVE-2020-5283

ViewVC before versions 1.1.28 and 1.2.1 has a XSS vulnerability in CVS show_subdir_lastmod support. The impact of this vulnerability is mitigated by the need for an attacker to have commit privileges to a CVS repository exposed by an otherwise trusted ViewVC instance that also has the `show_subdir_lastmod` feature enabled. The attack vector involves files with unsafe names (names that, when embedded into an HTML stream, would cause the browser to run unwanted code), which themselves can be challenging to create. This vulnerability is patched in versions 1.2.1 and 1.1.28.

• CWE-80
• CWE-79

• https://github.com/viewvc/viewvc/commit/ad0f966e9a997b17d853a6972ea283d4dcd70fa8Patch, Third Party Advisory
• https://github.com/viewvc/viewvc/issues/211Exploit, Issue Tracking, Third Party Advisory
• https://github.com/viewvc/viewvc/security/advisories/GHSA-xpxf-fvqv-7mfgMitigation, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2Q2STF2MKT24HXZ3YZIU7CN6F6QM67I5/
• https://github.com/viewvc/viewvc/commit/ad0f966e9a997b17d853a6972ea283d4dcd70fa8Patch, Third Party Advisory
• https://github.com/viewvc/viewvc/issues/211Exploit, Issue Tracking, Third Party Advisory
• https://github.com/viewvc/viewvc/security/advisories/GHSA-xpxf-fvqv-7mfgMitigation, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2Q2STF2MKT24HXZ3YZIU7CN6F6QM67I5/

Published

Apr 3, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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