GHSA-5fxv-xx5p-g2fv is a high-severity (CVSS 7.2) CWE-190 vulnerability in microweber/microweber. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.
Integer Overflow in microweber
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-5fxv-xx5p-g2fv plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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 is a new generation CMS with drag and drop. The microweber application allows large characters to insert in the input field "first & last name" which can allow attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The first name & last name input should be limited to 50 characters or max 100 characters
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | microweber/microweber | all versions | No fix |
Research 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.
Remediation status
No patched version of microweber/microweber has shipped for GHSA-5fxv-xx5p-g2fv yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-5fxv-xx5p-g2fv can be triaged on real exposure rather than presence alone.
Tailored to GHSA-5fxv-xx5p-g2fv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect GHSA-5fxv-xx5p-g2fv
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-5fxv-xx5p-g2fv -u https://target- Template
- Microweber <1.2.12 - Integer Overflow
- Severity
- medium
- Impact
- Successful exploitation of this vulnerability could lead to remote code execution or denial of service.
- Remediation
- First name and last name input should be limited to 50 characters or maximum 100 characters.
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-5fxv-xx5p-g2fv in your dependencies?
O3 Security finds GHSA-5fxv-xx5p-g2fv across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.