CVE-2025-51502 Microweber has Reflected XSS Vulnerability in the layout Parameter

What is CVE-2025-51502?

CVE-2025-51502 is a medium-severity cross-site scripting vulnerability in Microweber Microweber, published on 1 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Reflected Cross-Site Scripting (XSS) in Microweber CMS 2.0 via the layout parameter on the /admin/page/create page allows arbitrary JavaScript execution in the context of authenticated admin users.

Weakness: CWE-79

Which versions are affected by CVE-2025-51502?

2 open source packages ship an affected version, including microweber/microweber. It affects 1 product.

Products include Microweber Microweber.

How do I fix CVE-2025-51502?

No fix has been published for CVE-2025-51502 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-51502 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-51502 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in Microweber Microweber

• CVE-2022-0558 Cross-site Scripting (XSS) - Stored in microweber/microweber Critical 9.8
• CVE-2020-23138 File upload in n/a Critical 9.8
• CVE-2022-0688 Business Logic Errors in microweber/microweber Critical 9.4
• CVE-2022-0660 Generation of Error Message Containing Sensitive Information in microweber/microweber Critical 9.4
• CVE-2022-0913 Integer Overflow or Wraparound in microweber/microweber Critical 9.1

All Microweber Microweber vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mvj3-hc7j-vp74.