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MEDIUM severity

CVE-2025-51501 — microweber

MEDIUM

CVE-2025-51501 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in microweber/microweber. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Microweber has Reflected XSS Vulnerability in the id Parameter

Also known asGHSA-8357-fjvx-xrm8
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-51501.

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk+0.04%
Lower risk than most CVEs60th percentile — riskier than 60% of all scored CVEsHighest risk
0.00%0.47%0.93%1.40%0.2%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘microweber/microweber

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Reflected Cross-Site Scripting (XSS) in the id parameter of the live_edit.module_settings API endpoint in Microweber CMS2.0 allows execution of arbitrary JavaScript.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistmicroweber/microweber≥ 2.0.0No fix

Affected Products

1 product · 1 configurations
Application
microwebermicroweber
1 version
2.0.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for microweber/microweber, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of microweber/microweber for CVE-2025-51501. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

How to detect CVE-2025-51501

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2025-51501 -u https://target
Template
Microweber CMS2.0 - Cross-Site Scripting
Severity
medium
Impact
Authenticated attackers can execute arbitrary JavaScript in victim browsers through the id parameter in the module_settings API, potentially leading to session hijacking.
Remediation
Upgrade Microweber CMS to a version later than 2.0 that properly sanitizes the id parameter in live_edit endpoints.

Template by ProjectDiscovery nuclei-templates (nukunga), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Reflected Cross-Site Scripting (XSS) in the id parameter of the live_edit.module_settings API endpoint in Microweber CMS2.0 allows execution of arbitrary JavaScript.
O3 Security · Impact-Aware SCA

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CVE-2025-51501: microweber XSS (Medium 6.1)