CVE-2026-116203

YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability in the filtertags action, which echoes attacker-controlled token values without output encoding. Anonymous attackers can inject markup via action-attribute parameters that bypasses the allow_raw_html gate, executing JavaScript for every page viewer.

Score

CVSS 3.1 6.1 Medium

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-25

Last modified

2026-10-26

Weaknesses

CWE-79

Affected products

• Yeswiki (Yeswiki)

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-f53x-3gqx-xq76
• https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-stored-xss-via-filtertags-action-parameters