Mailu missing authentication on PATCH /api/v1/token/<id>, which allows unauthenticated removal of IP restrictions
Priority LOW 39CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Mailu is a mail server as a set of Docker images. Prior to version 2024.06.52, a missing authorization check in the Mailu admin REST API allows any unauthenticated attacker to remove any potential IP restriction or update the comment field from any existing user token provided the REST API is enabled. Upgrade to Mailu 2024.06.52 to receive a patch or, as a workaround, turn the REST API off.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix Fixed Mailu (Mailu): 2024.06.52
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Mailu (Mailu) Fixed in 2024.06.52
Timeline
- 2026-10-02 Threatist record created from CVE-2026-49217
More Mailu vulnerabilities
- TI-2026-75367 Mailu lets domain managers enable spoofing on other hosted domains CVSS 4.0HIGH 8.2
- TI-2026-58835 Mailu: Authentication bypass in header-based proxy authentication via spoofable `X-Forwarded-By` trust CVSS 3.1CRITICAL 9.8
- TI-2020-04295 Unspecified vulnerability in the fetchmail script in Mailu CVSS 3.1HIGH 8.8
- TI-2026-75366 Mailu domain managers can take over higher-privileged accounts CVSS 3.1HIGH 7.2
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences