XSS in Yeswiki
CVE-2025-46550
YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the `/?BazaR` endpoint and `idformulaire` parameter are vulnerable to cross-site scripting. An attacker can use a reflected cross-site scripting attack to steal cookies from an authenticated user by having them click on a malicious link. Stolen cookies allow the attacker to take over the user’s session. This vulnerability may also allow attackers to deface the website or embed malicious content. This issue has been patched in version 4.5.4.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
Affected products
- Yeswiki — versions < 4.5.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-46550?
- CVE-2025-46550 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2025-04-29.
- How severe is CVE-2025-46550?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2025-46550 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.