OAuth flow hijacking via unescaped redirect regex
Published Nov 21, 2024 · Updated Sep 23, 2025
Incorrect redirect URI validation in authentik before 2024.8.5 and 2024.10.0-rc1 through 2024.10.2 allows remote attackers to hijack OAuth flows. The OAuth2 provider treats configured redirect URIs, and the first supplied URI when none exist, as regular expressions without escaping metacharacters. A provider with an empty list or an unescaped pattern is required; a lookalike attacker domain then passes validation and receives the redirect.
Summary
What happened
Incorrect redirect URI validation in authentik before 2024.8.5 and 2024.10.0-rc1 through 2024.10.2 allows remote attackers to hijack OAuth flows. The OAuth2 provider treats configured redirect URIs, and the first supplied URI when none exist, as regular expressions without escaping metacharacters. A provider with an empty list or an unescaped pattern is required; a lookalike attacker domain then passes validation and receives the redirect.
The record
- CVE
- CVE-2024-52289
- Published
- Nov 21, 2024
- Updated
- Sep 23, 2025
- Vendor
- Authentik Security Inc.
- Product
- authentik
- Classifications
- CWE-185, T1583.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 21, 2024CVE publishedPublication date reported by the CVE source.
- Sep 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2024.8.5
- Affected versionversion=>= 2024.10.0-rc1, < 2024.10.3
- Affected versionversion=2024.10.0-rc1 <2024.10.3
- Affected versionversion=< 2024.8.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo