Description
OpenCATS before 0.10.0 contains a missing authorization vulnerability in ajax/deleteActivity.php and ajax/editActivity.php that allows READ-level users to edit and delete activity entries. Authenticated attackers can supply an arbitrary activityID via GET or POST to modify or delete activity and pipeline history for candidates, contacts and companies.
References6
- 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: 17 · 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.