CVE-2026-108740
GoatCounter through 2.7.0 Privilege Escalation via /user/pref Mass Assignment
CVSS Score
8.3
EPSS Score
0.0%
EPSS Percentile
0th
GoatCounter through 2.7.0 contains a mass assignment privilege escalation vulnerability in the userPrefSave handler that allows logged-in users to modify protected account fields via form-encoded requests. Attackers with read-only access can POST user.access[all]=* and user.email_verified=true to /user/pref, bypassing readonly tags to gain superuser or admin access.
| CWE | CWE-915 |
| Vendor | arp242 |
| Product | goatcounter |
| Published | Oct 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High
Affected Versions
arp242 / GoatCounter
0 ≤ 2.7.0
References
hackmd.io: https://hackmd.io/@haind03/goatcounter-user-pref-access-mass-assignment-20261011 github.com: https://github.com/arp242/goatcounter/blob/7e91d8a9bdbb0dd48496e498c5680f8f3477a1b4/handlers/settings_user.go#L33-L99 github.com: https://github.com/arp242/goatcounter/blob/7e91d8a9bdbb0dd48496e498c5680f8f3477a1b4/user.go#L191-L218 github.com: https://github.com/arp242/goatcounter vulncheck.com: https://www.vulncheck.com/advisories/goatcounter-through-2.7.0-privilege-escalation-via-user-pref-mass-assignment
Credits
HaiND from the Post and Telecommunication Institute of Technology