XSS in Yeswiki
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/YesWiki/yeswiki/security/advisories/GHSA-f53x-3gqx-xq76 (vendor-advisory)
- www.vulncheck.com/advisories/yeswiki-before-4.7.0-stored-xss-via-filtertags-act… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116203?
- CVE-2026-116203 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-25.
- How severe is CVE-2026-116203?
- Medium severity. CVSS v3 base score is 6.1 out of 10.