CVE-2026-112784

EUVD-2026-104916
OpenCATS before 0.10.0 contains a missing authorization vulnerability in ajax/testEmailSettings.php that allows any authenticated user to send mail through the configured SMTP relay. Read-level users can supply testEmailAddress and fromAddress parameters to send the fixed test message to any recipient with a spoofed From address.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 14.88%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
opencatsopencats
𝑥
< 0.10.0
CNA
Common Weakness Enumeration
References
https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/testEmailSettings.php
https://github.com/opencats/OpenCATS/commit/aa3b414c3672f5010ca26c44192aa8e72d3735bd
https://github.com/opencats/OpenCATS/issues/720
https://github.com/opencats/OpenCATS/releases/tag/v0.10.0
https://www.vulncheck.com/advisories/opencats-before-0.10.0-missing-authorization-via-ajax-testemailsettings-php