Description
OpenCATS before 0.10.0 contains a missing authorization vulnerability that allows READ-level users to create, rename, delete, and populate saved lists via AJAX endpoints. Authenticated attackers can send requests to newList.php, editListName.php, deleteList.php, or addToLists.php with any savedListID to alter or delete any saved list site-wide.
References8
- github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5…
- github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5…
- github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5…
- github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5…
- github.com/opencats/OpenCATS/commit/aa3b414c3672f5010ca26c44192…
- github.com/opencats/OpenCATS/issues/720
- github.com/opencats/OpenCATS/releases/tag/v0.10.0
- www.vulncheck.com/advisories/opencats-before-0.10.0-missing-aut…
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 19 · as of 9 November 2026
- CWE
- CWE-862
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.