Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck

CVE-2026-116824YesWiki before 4.7.0 Stored XSS via Referer Header in referrers_sites Handler

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 stored cross-site scripting vulnerability in handlers/page/referrers_sites.php that allows unauthenticated attackers to inject scripts via crafted Referer headers. Attackers can send a Referer hostname containing HTML metacharacters that renders unescaped, executing JavaScript for any referrer-sites page visitor to perform same-origin authenticated actions.

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-xcwg-2pj5-3qm4) vendor-advisory
VulnCheck Advisory: YesWiki before 4.7.0 Stored XSS via Referer Header in referrers_sites Handler third-party-advisory