Description
RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.9 and prior in addition to 6.0.0 through 6.0.2 contain an authentication bypass vulnerability in RT installations that use LDAP/AD for user authentication. Under certain LDAP server configurations, an attacker may be able to authenticate as any LDAP-backed RT user without supplying valid credentials. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are unable to upgrade immediately, they can temporarily work around this issue by reviewing their LDAP server's authentication policy to ensure it rejects unauthenticated bind attempts. Upgrading RT remains the recommended fix.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/bestpractical/rt/security/advisories/GHSA-3w28-fmcr-mjjx
X_Refsource_Misc x_refsource_misc
https://github.com/bestpractical/rt/releases/tag/rt-5.0.10
X_Refsource_Misc x_refsource_misc
https://github.com/bestpractical/rt/releases/tag/rt-6.0.3
Scores
CVSS v3
8.1
EPSS
0.0048
EPSS Percentile
37.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-287
Status
published
Products (2)
bestpractical/rt
< 5.0.10
bestpractical/rt
>= 6.0.0, < 6.0.3
Published
May 22, 2026
Tracked Since
May 23, 2026