GHSA-5hfj-r725-wpc4 is a high-severity (CVSS 8.8) CWE-74 vulnerability in october/system. 1 public exploit reference exists, so weaponization risk is real. A fix is available for october/system — see the affected versions and patch details below.
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for GHSA-5hfj-r725-wpc4.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-5hfj-r725-wpc4 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% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
october/system🐘october/systemReal-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
Impact
Assuming an attacker with access to the backend is able to execute PHP code by using the theme import feature. This will bypass the safe mode feature that prevents PHP execution in the CMS templates.
Patches
Issue has been patched in Build 473 and v1.1.6
Workarounds
Apply https://github.com/octobercms/october/commit/167b592eed291ae1563c8fcc5b9b34a03a300f26 to your installation manually if you are unable to upgrade.
References
Credits to: • Sushi Yushi
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | october/system | ≥ 1.1.0&&< 1.1.6 | 1.1.6composer require october/system:^1.1.6 |
| 🐘Packagist | october/system | all versions | 1.0.473composer require october/system:^1.0.473 |
Affected Products
octoberoctobercmsResearch 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 october/system, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update october/system to 1.1.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5hfj-r725-wpc4 is resolved across your whole dependency graph.
Workarounds
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.
Frequently Asked Questions
Is GHSA-5hfj-r725-wpc4 in your dependencies?
Find it across Packagist, including transitive dependencies.