XSS in Yeswiki
CVE-2026-116823
YesWiki before 4.7.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject JavaScript by supplying query parameters matching missing Bazar field names. Attackers can craft links where BazarField::getValue() falls back to unsanitized $_REQUEST values rendered via Twig |raw templates, performing same-origin authenticated actions in victims' sessions.
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-hcvp-q8fx-84mc (vendor-advisory)
- www.vulncheck.com/advisories/yeswiki-before-4.7.0-reflected-xss-via-bazarfield-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116823?
- CVE-2026-116823 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-27.
- How severe is CVE-2026-116823?
- Medium severity. CVSS v3 base score is 6.1 out of 10.