by Kastro
Paper/Archive/CVE-2026-55742

CVE-2026-55742

Cotonti Cotonti — Cotonti CSRF in admin.rights.php allows privilege escalation

EPSS 0.2%CVSS 9.6
critical.is priorityof 100
30
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 4.2.042 × 200.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cot_auth_add_group) without calling cot_check_xg to validate the anti-CSRF token.

Affected

ProductAffectedFixed inSource
Cotonti1.0.0–CNA

Scores by source

TuranSec (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
TuranSec (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeupgithub.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.rights.php#L53refgithub.com/Cotonti/Cotonti