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.

Score

CVSS 3.1 6.1 Medium

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-26

Last modified

2026-10-27

Weaknesses

CWE-79

Affected products

• Yeswiki (Yeswiki)

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-hcvp-q8fx-84mc
• https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-reflected-xss-via-bazarfield-request-fallback