Keycloak-services: keycloak-services: oidc logout endpoint session fixation via id_token_hint leading to account takeover
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.34% · 27th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 24/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The OIDC logout endpoint in the keycloak-services component of Red Hat Build of Keycloak sets a session cookie based on an unvalidated token hint before completing security checks. A remote attacker with low-privilege access can exploit this, with the victim's action required, to fix a session ID in the victim's browser and hijack their later login for full control of the account.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
A flaw was found in the OIDC logout endpoint of the keycloak-services component, which handles user session termination in Red Hat Build of Keycloak. The issue occurs because the system sets a session cookie based on an unvalidated token hint before completing security checks. An attacker can use this flaw to fix a session ID in a victim's browser, allowing them to hijack the victim's subsequent login and gain full control over their account.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure3/25Reachable over the network · Unknown: No advisory context yet
- Reach10/20Shipped in major Linux distributions
- Severity6.4/10CVSS 6.4
- No patch5/5No patch listed yet
What would change the score
- Would score about 79 if added to CISA KEV
- Would score about 74 if CISA's SSVC rates exploitation active
- Would score about 43 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
- Record last updated
Affected versions
- rhbk/keycloak-operator-bundle
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- rhbk/keycloak-rhel9-operator
Version range not reported
- keycloak-services
Version range not reported
- rhbk/keycloak-rhel9
Version range not reported
- keycloak-services
Version range not reported
Evidence 4
- Advisory
- Advisory
- Report
- Link
Corrections
None so far.
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