CVE-2020-25633
MEDIUMCVE-2020-25633 is a medium-severity (CVSS 5.3) CWE-209 vulnerability in org.jboss.resteasy:resteasy-client. O3 Security confirms whether CVE-2020-25633 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Generation of Error Message Containing Sensitive Information in RESTEasy client
Blast Radius
org.jboss.resteasy:resteasy-client☕org.jboss.resteasy:resteasy-client-microprofile☕org.jboss.resteasy:resteasy-client☕org.jboss.resteasy:resteasy-client-microprofileReal-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
A flaw was found in RESTEasy client in all versions of RESTEasy up to 4.5.6.Final. It may allow client users to obtain the server's potentially sensitive information when the server got WebApplicationException from the RESTEasy client call. The highest threat from this vulnerability is to data confidentiality.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jboss.resteasy:resteasy-client | ≥ 4.0.0&&< 4.5.7.Final | 4.5.7.Final |
| ☕Maven | org.jboss.resteasy:resteasy-client-microprofile | ≥ 4.0.0&&< 4.5.7.Final | 4.5.7.Final |
| ☕Maven | org.jboss.resteasy:resteasy-client | all versions | 3.14.0.Final |
| ☕Maven | org.jboss.resteasy:resteasy-client-microprofile | all versions | 3.14.0.Final |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jboss.resteasy:resteasy-client. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.jboss.resteasy:resteasy-client to 4.5.7.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-25633 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 pinpoints whether CVE-2020-25633 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2020-25633. 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-2020-25633 in your dependencies?
O3 detects CVE-2020-25633 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.