Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the SSO mechanism in Zammad was not verifying the header originates from a trusted SSO proxy/gateway before applying further actions on it. This vulnerability is fixed in 7.0.1 and 6.5.4.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/zammad/zammad/security/advisories/GHSA-hcv6-w4h9-p2p7
Scores
CVSS v3
4.3
EPSS
0.0010
EPSS Percentile
1.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-346
Status
published
Products (3)
zammad/zammad
7.0.0
zammad/zammad
< 6.5.4 (2 CPE variants)
zammad/zammad
>= 7.0.0-alpha, < 7.0.1
Published
Apr 08, 2026
Tracked Since
Apr 09, 2026