Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck

CVE-2026-116823YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback

Medium 6.1

In plain English

A medium-severity cross-site scripting in yeswiki from YesWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 92.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
YesWiki	yeswiki	0 – before 4.7.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-hcvp-q8fx-84mc) vendor-advisory
VulnCheck Advisory: YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST Fallback third-party-advisory