Vulnerability · Published Aug 26, 2022 · Assigned by redhat
CVE-2021-3856
Medium 4.3
In plain English
A medium-severity security flaw in keycloak. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.3Medium
Exploit odds (30 days)1.2%top 32.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
ClassLoaderTheme and ClasspathThemeResourceProviderFactory allows reading any file available as a resource to the classloader. By sending requests for theme resources with a relative path from an external HTTP client, the client will receive the content of random files if available.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.keycloak:keycloak-core | 15.1.0 | GHSA-3w4v-rvc4-2xpw |
Affected products (as reported)
Weakness: CWE-552
References
- https://issues.redhat.com/browse/KEYCLOAK-19422 x_refsource_MISC
- https://github.com/keycloak/keycloak/pull/8588 x_refsource_MISC
- https://github.com/keycloak/keycloak/commit/73f0474008e1bebd0733e62a22aceda9e5de6743 x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=2010164 x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2021-3856 x_refsource_MISC