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NVD / CVE Program· CNA redhat

CVE-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 URL using the OIDC parameter

Noroxi assessment

Priority: Plan (action score 42/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 69.7% (FIRST EPSS); higher than 99.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: org.keycloak:keycloak-core (Maven) 13.0.0; rh-sso7-keycloak (Red Hat:red_hat_single_sign_on:7::el6) 0:9.0.11-1.redhat_00001.1.el6sso; rh-sso7-keycloak-server (Red Hat:red_hat_single_sign_on:7::el6) 0:9.0.11-1.redhat_00001.1.el6sso.

Add it to your regular patch cycle. Upgrade to org.keycloak:keycloak-core (Maven) 13.0.0; rh-sso7-keycloak (Red Hat:red_hat_single_sign_on:7::el6) 0:9.0.11-1.redhat_00001.1.el6sso; rh-sso7-keycloak-server (Red Hat:red_hat_single_sign_on:7::el6) 0:9.0.11-1.redhat_00001.1.el6sso or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.3 · v3.1—Proof of concept Fix available
Published
Dec 15, 2020
Updated
Jun 16, 2026
EPSS
69.7% · 99th percentile

Report tools

JSON

Action score

42

Plan

Add it to your regular patch cycle.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
21 / 30 · 69.7%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-10770

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatkeycloak

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • redhat keycloakbefore 12.0.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a keycloak

    • keycloak 13.0.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.keycloak:keycloak-corebefore 13.0.013.0.0
Red Hat:red_hat_single_sign_on:7::el6rh-sso7-keycloakbefore 0:9.0.11-1.redhat_00001.1.el6sso0:9.0.11-1.redhat_00001.1.el6sso
Red Hat:red_hat_single_sign_on:7::el6rh-sso7-keycloak-serverbefore 0:9.0.11-1.redhat_00001.1.el6sso0:9.0.11-1.redhat_00001.1.el6sso
Red Hat:red_hat_single_sign_on:7::el7rh-sso7-keycloakbefore 0:9.0.11-1.redhat_00001.1.el7sso0:9.0.11-1.redhat_00001.1.el7sso
Red Hat:red_hat_single_sign_on:7::el7rh-sso7-keycloak-serverbefore 0:9.0.11-1.redhat_00001.1.el7sso0:9.0.11-1.redhat_00001.1.el7sso
Red Hat:red_hat_single_sign_on:7::el8rh-sso7-keycloakbefore 0:9.0.11-1.redhat_00001.1.el8sso0:9.0.11-1.redhat_00001.1.el8sso
Red Hat:red_hat_single_sign_on:7::el8rh-sso7-keycloak-serverbefore 0:9.0.11-1.redhat_00001.1.el8sso0:9.0.11-1.redhat_00001.1.el8sso

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-1245A privilege escalation flaw was found in the token exchange feature of keycloak.
    39Monitor
  • CVE-2019-14910A vulnerability was found in keycloak 7.x, when keycloak is configured with LDAP user federation and StartTLS is used instead of SSL/TLS fro
    39Monitor
  • CVE-2022-3782keycloak: path traversal via double URL encoding.
    38Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-10776Nov 16, 2020 · A flaw was found in Keycloak before version 12.0.0, where it is possible to add unsafe schemes for the redirect_uri parameter.
    19Monitor
  • ← EarlierCVE-2020-14389Nov 16, 2020 · It was found that Keycloak before version 12.0.0 would permit a user with only view-profile role to manage the resources in the new account
    32Monitor
  • Later →CVE-2020-14302Dec 15, 2020 · A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful authentication, redirects to a Keycloak end
    19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.keycloak:keycloak-core13.0.0Package registry (OSV)
red hat:rh-sso7-keycloak0:9.0.11-1.redhat_00001.1.el6sso · Red Hat:red_hat_single_sign_on:7::el6Package registry (OSV)
red hat:rh-sso7-keycloak-server0:9.0.11-1.redhat_00001.1.el6sso · Red Hat:red_hat_single_sign_on:7::el6Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2021-10-13
Nuclei detection templateNuclei template CVE-2020-10770 —
Proof-of-concept repository on GitHubstars:92021-10-13
Proof-of-concept repository on GitHubstars:22026-09-05

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+301 d
  3. TodayOct 30, 2026+2145 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-918 · Server-Side Request Forgery (SSRF)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records