CVE-2017-8031 — cloudfoundry-identity-ser…
MEDIUMCVE-2017-8031 is a medium-severity (CVSS 5.3) vulnerability in org.cloudfoundry.identity:cloudfoundry-identity-server. A fix is available for org.cloudfoundry.identity:cloudfoundry-identity-server — see the affected versions and patch details below.
Cloud Foundry UAA Denial of Service through client token revocation endpoint
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
CVE-2017-8031 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 377,238 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
org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-server☕org.cloudfoundry.identity:cloudfoundry-identity-serverReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
An issue was discovered in Cloud Foundry Foundation cf-release (all versions prior to v279) and UAA (30.x versions prior to 30.6, 45.x versions prior to 45.4, 52.x versions prior to 52.1). In some cases, the UAA allows an authenticated user for a particular client to revoke client tokens for other users on the same client. This occurs only if the client is using opaque tokens or JWT tokens validated using the check_token endpoint. A malicious actor could cause denial of service.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | ≥ 4.6.0&&< 4.7.1 | 4.7.1org.cloudfoundry.identity:cloudfoundry-identity-server:4.7.1 |
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | ≥ 4.0.0&&< 4.5.3 | 4.5.3org.cloudfoundry.identity:cloudfoundry-identity-server:4.5.3 |
| ☕Maven | org.cloudfoundry.identity:cloudfoundry-identity-server | all versions | 3.20.1org.cloudfoundry.identity:cloudfoundry-identity-server:3.20.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.cloudfoundry.identity:cloudfoundry-identity-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.cloudfoundry.identity:cloudfoundry-identity-server to 4.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-8031 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 CVE-2017-8031 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2017-8031. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2017-8031 in your dependencies?
O3 Security finds CVE-2017-8031 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.