GHSA-jjp3-m93h-5jm4 is a medium-severity (CVSS 6.8) Cross-site Scripting (XSS) vulnerability in microweber/microweber. 1 public exploit reference exists, so weaponization risk is real. A fix is available for microweber/microweber — see the affected versions and patch details below.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-jjp3-m93h-5jm4 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
microweber/microweberReal-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
Microweber drag and drop website builder and CMS with e-commerce. Cross-site Scripting (XSS) discovered in microweber prior to 1.2.12. There is currently no known workaround, users are recommended to update to version 1.2.12.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | microweber/microweber | all versions | 1.2.12composer require microweber/microweber:^1.2.12 |
Affected Products
microwebermicroweberResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update microweber/microweber to 1.2.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jjp3-m93h-5jm4 is resolved across your whole dependency graph.
Workarounds
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 GHSA-jjp3-m93h-5jm4
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-jjp3-m93h-5jm4 -u https://target- Template
- Microweber < 1.2.12 - Stored Cross-Site Scripting
- Severity
- medium
- Impact
- Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
- Remediation
- Upgrade Microweber to version 1.2.12 or later to mitigate this vulnerability.
Template by ProjectDiscovery nuclei-templates (amit-jd), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-jjp3-m93h-5jm4 in your dependencies?
Find it across Packagist, including transitive dependencies.