Description
Open Ticket Request System (OTRS) 4.0.x before 4.0.28, 5.0.x before 5.0.26, and 6.0.x before 6.0.3, when cookie support is disabled, might allow remote attackers to hijack web sessions and consequently gain privileges via a crafted email.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | otrs2 | 6.0.3-1 | — |
| Debian 9 | otrs2 | 5.0.16-1+deb9u5 | DSA-4069-1 |
| Debian 8 | otrs2 | 3.3.18-1+deb8u4 | DSA-4069-1 |
| Debian 7 | otrs2 | 3.3.18-1~deb7u3 | DLA-1215-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | otrs2 | No fix yet | — |
Advisories 2
- DSA-4069-1 otrs2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1215-1 otrs2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/OTRS/otrs/commit/720c73fbf53e476ca7dfdf2ae1d4d3d2aad2b953
- https://www.otrs.com/security-advisory-2017-10-security-update-otrs-framework/
- https://github.com/OTRS/otrs/commit/36e3be99cfe8a9e09afa1b75fdc39f3e28f561fc
- DSA-4069 vendor-advisory
- [debian-lts-announce] 20171220 [SECURITY] [DLA 1215-1] otrs2 security update mailing-list
- https://github.com/OTRS/otrs/commit/26707eaaa791648e6c7ad6aeaa27efd70e7c66eb