Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, any authenticated user can call the REST endpoint for getting a tag list and receive the tag names for the given ticket, regardless of whether they have access to that ticket. Tags are an internal categorization feature and may contain sensitive labels.
Ticket IDs are sequential integers, making bulk enumeration straightforward. This issue is fixed in version 7.1.2.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/zammad/zammad/commit/13217eb6b3fdf350228b13f8cf69f640b8fd0da2
security-advisories@github.com
https://github.com/zammad/zammad/commit/d1a5eabdd1285b202f75761c4406edc5509e217e
security-advisories@github.com
https://github.com/zammad/zammad/security/advisories/GHSA-6vgm-xxp4-p6jv
security-advisories@github.com