GHSA-3wwj-wh2w-g4xp is a high-severity (CVSS 7.6) CWE-93 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-3wwj-wh2w-g4xp by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the 10–50% 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
CRLF Injection leads to Stack Trace Exposure due to lack of filtering at https://demo.microweber.org/ in Packagist microweber/microweber prior to 1.2.11.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | microweber/microweber | all versions | 1.2.11composer require microweber/microweber:^1.2.11 |
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 1.2.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3wwj-wh2w-g4xp is resolved across your whole dependency graph.
Workarounds
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 to detect GHSA-3wwj-wh2w-g4xp
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-3wwj-wh2w-g4xp -u https://target- Template
- Microweber < 1.2.11 - CRLF Injection
- Severity
- high
- Impact
- Attackers can inject CRLF sequences via the redirect_to parameter to set arbitrary cookies or inject additional HTTP headers, potentially facilitating session hijacking or cache poisoning attacks.
- Remediation
- Upgrade to Microweber version 1.2.11 or later.
Template by ProjectDiscovery nuclei-templates (ritikchaddha), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-3wwj-wh2w-g4xp in your dependencies?
Find it across Packagist, including transitive dependencies.