GHSA-c7q8-m4xw-c674 — silverstripe/hybridsessio…
MEDIUMGHSA-c7q8-m4xw-c674 is a medium-severity (CVSS 6.5) CWE-384 vulnerability in silverstripe/hybridsessions. A fix is available for silverstripe/hybridsessions — see the affected versions and patch details below.
Hybridsessions does not expire session id on logout
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-c7q8-m4xw-c674 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 378,567 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
silverstripe/hybridsessions🐘silverstripe/hybridsessionsReal-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
When using the hybridsessions module is used without the session-manager module installed and sessions IDs are saved to disk, unexpired SessionIDs of logged out users can still be used to make authenticated requests.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | silverstripe/hybridsessions | ≥ 1.0.0&&< 2.4.1 | 2.4.1composer require silverstripe/hybridsessions:^2.4.1 |
| 🐘Packagist | silverstripe/hybridsessions | ≥ 2.5.0&&< 2.5.1 | 2.5.1composer require silverstripe/hybridsessions:^2.5.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for silverstripe/hybridsessions, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update silverstripe/hybridsessions to 2.4.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c7q8-m4xw-c674 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 O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-c7q8-m4xw-c674 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-c7q8-m4xw-c674. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-c7q8-m4xw-c674 in your dependencies?
O3 Security finds GHSA-c7q8-m4xw-c674 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.