PatchTheCVECVE-2020-10770: A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified
CVE-2020-10770 is a medium-severity flaw (CVSS 5.3) affecting keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter request_uri. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.
Why this priority
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 69.7% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-918 |
| Published | 2020-12-15 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated)
- Nuclei scan template: Keycloak <= 12.0.1 - request_uri Blind Server-Side Request Forgery (SSRF)
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-10770?
keycloak: upgrade to 12.0.2. Exact commands for each OS are on this page.
Is CVE-2020-10770 being exploited?
CVE-2020-10770 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-10770 affect?
CVE-2020-10770 affects keycloak. Severity is medium (CVSS 5.3). A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter request_uri. This flaw allows an attacker to use this parameter to execute a Server-side request for
How urgent is CVE-2020-10770?
Priority 58/100. EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist
Software pages
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