XSS in Getformwork Formwork
CVE-2026-82451
Formwork before 2.3.11 contains a stored cross-site scripting vulnerability in visit tracking that records the Referer header host unescaped. Unauthenticated attackers can craft malicious Referer headers to inject markup that executes in administrator browsers when viewing the Statistics panel.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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
EPSS: 0.004 (27.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/getformwork/formwork/security/advisories/GHSA-hpgc-57cm-66pc (vendor-advisory)
- github.com/getformwork/formwork/blob/89d1908572e55809d6ee1771f59a816494c29573/p… (technical-description)
- github.com/getformwork/formwork (product)
- www.vulncheck.com/advisories/formwork-through-2.3.14-stored-xss-via-referer-hea… (third-party-advisory)
- github.com/getformwork/formwork/releases/tag/2.3.11 (release-notes)
- www.vulncheck.com/advisories/formwork-stored-xss-via-referer-header (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82451?
- CVE-2026-82451 is a medium-severity vulnerability in Getformwork Formwork, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-29.
- How severe is CVE-2026-82451?
- Medium severity. CVSS v3 base score is 6.1 out of 10.