XSS in Admidio
CVE-2026-109327
Admidio 4.0.12 through 4.3.17 and 5.0.0 before 5.0.15 contains a reflected cross-site scripting vulnerability in system/redirect.php that allows unauthenticated attackers to inject JavaScript via the url GET parameter, due to an incomplete fix for CVE-2021-43810. Attackers can craft a javascript: URL containing a decoy http:// segment that passes validation and executes script in the Admidio origin when victims click the redirect link.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
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/Admidio/admidio/security/advisories/GHSA-vxfg-x6vc-7w3w (vendor-advisory)
- www.vulncheck.com/advisories/admidio-4.0.12-through-4.3.17-and-5.0.0-before-5.0… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109327?
- CVE-2026-109327 is a medium-severity vulnerability in Admidio, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-12.
- How severe is CVE-2026-109327?
- Medium severity. CVSS v3 base score is 6.1 out of 10.