CVE-2021-22044 — spring-cloud-openfeign-co…
HIGHCVE-2021-22044 is a high-severity (CVSS 7.5) Information Exposure vulnerability in org.springframework.cloud:spring-cloud-openfeign-core. A fix is available for org.springframework.cloud:spring-cloud-openfeign-core — see the affected versions and patch details below.
Exposure of Resource to Wrong Sphere in Spring Cloud OpenFeign
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-2021-22044 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 378,156 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.springframework.cloud:spring-cloud-openfeign-core☕org.springframework.cloud:spring-cloud-openfeign-coreReal-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
In Spring Cloud OpenFeign 3.0.0 to 3.0.4, 2.2.0.RELEASE to 2.2.9.RELEASE, and older unsupported versions, applications using type-level @RequestMappingannotations over Feign client interfaces, can be involuntarily exposing endpoints corresponding to @RequestMapping-annotated interface methods.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.springframework.cloud:spring-cloud-openfeign-core | ≥ 3.0.0&&< 3.0.5 | 3.0.5org.springframework.cloud:spring-cloud-openfeign-core:3.0.5 |
| ☕Maven | org.springframework.cloud:spring-cloud-openfeign-core | ≥ 2.2.0&&< 2.2.10 | 2.2.10org.springframework.cloud:spring-cloud-openfeign-core:2.2.10 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.springframework.cloud:spring-cloud-openfeign-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.springframework.cloud:spring-cloud-openfeign-core to 3.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-22044 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-2021-22044 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2021-22044. 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-2021-22044 in your dependencies?
O3 Security finds CVE-2021-22044 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.