CVE-2020-10770
Keycloak vulnerable to Server-Side Request Forgery
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-10770- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-10770- Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2022-4372 No score
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.
- Record
EUVD-2022-4372- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jh7q-5mwf-qvhw
Keycloak vulnerable to Server-Side Request Forgery
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.
- Record
GHSA-jh7q-5mwf-qvhw- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2020-10770- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-jh7q-5mwf-qvhw
Keycloak vulnerable to Server-Side Request Forgery
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.
- Record
GHSA-jh7q-5mwf-qvhw- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-601, CWE-918
- Updated
- 2026-11-02
OSVRHSA-2021:0318
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.5 security update on RHEL 6
- Record
RHSA-2021:0318- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L - Updated
- 2026-11-02
OSVRHSA-2021:0319
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.5 security update on RHEL 7
- Record
RHSA-2021:0319- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L - Updated
- 2026-11-02
OSVRHSA-2021:0320
Red Hat Security Advisory: Red Hat Single Sign-On 7.4.5 security update on RHEL 8
- Record
RHSA-2021:0320- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.keycloak:keycloak-coreMaven |
before 13.0.0 | 13.0.0 |
org.keycloak:keycloak-coreMaven |
before 13.0.0, plus listed versions 1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4 Show 45 moreShow less1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final |
13.0.0 |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el6 |
before 0:9.0.11-1.redhat_00001.1.el6sso | 0:9.0.11-1.redhat_00001.1.el6sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el6 |
before 0:9.0.11-1.redhat_00001.1.el6sso | 0:9.0.11-1.redhat_00001.1.el6sso |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el7 |
before 0:9.0.11-1.redhat_00001.1.el7sso | 0:9.0.11-1.redhat_00001.1.el7sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el7 |
before 0:9.0.11-1.redhat_00001.1.el7sso | 0:9.0.11-1.redhat_00001.1.el7sso |
rh-sso7-keycloakRed Hat:red_hat_single_sign_on:7::el8 |
before 0:9.0.11-1.redhat_00001.1.el8sso | 0:9.0.11-1.redhat_00001.1.el8sso |
rh-sso7-keycloak-serverRed Hat:red_hat_single_sign_on:7::el8 |
before 0:9.0.11-1.redhat_00001.1.el8sso | 0:9.0.11-1.redhat_00001.1.el8sso |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated) | 2021-10-13 |
| Nuclei | Keycloak <= 12.0.1 - request_uri Blind Server-Side Request Forgery (SSRF) | |
| PoC in GitHub | 0xlyvio/CVE-2020-10770-keycloak-exploit-poc | 2026-09-05 |
| PoC in GitHub | ColdFusionX/Keycloak-12.0.1-CVE-2020-10770 | 2021-10-13 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Nuclei, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-10770 is a medium vulnerability (CVSS 5.3) in Keycloak, published December 15, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 69.7%, the 99th percentile. Fixed in org.keycloak:keycloak-core 13.0.0.
References
bugzilla.redhat.com/show_bug.cgi?id=1846270
packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html
nvd.nist.gov/vuln/detail/CVE-2020-10770
github.com/keycloak/keycloak-documentation/pull/1086
issues.redhat.com/browse/KEYCLOAK-14019
Show 13 moreShow less
access.redhat.com/errata/RHSA-2021:0318
security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_0318.json
cve.org/CVERecord?id=CVE-2020-10770
Left out here: 72 versions. The JSON record has them.