CVE-2026-112784: medium-severity vulnerability in OpenCATS
OpenCATS before 0.10.0 Missing Authorization via ajax/testEmailSettings.php
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.2%
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.
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
Affected products
opencats · OpenCATSRelated CVEs — OpenCATS
In the same product, most dangerous first.
CVE-2026-27760CRITICALOpenCATS PHP Code Injection via installer AJAX endpointEPSS 33.0%CVE-2026-54453HIGHOpenCATS: Authenticated Remote Code Execution via SettingsUI (manageProfessional)EPSS 0.4%CVE-2026-54454CRITICALOpenCATS: Authenticated RCE in the Import moduleEPSS 0.4%CVE-2026-115513MEDIUMOpenCATS before 0.12.0 Stored XSS via MRU Navigation PanelEPSS 0.3%CVE-2026-112787MEDIUMOpenCATS before 0.10.0 Missing Authorization in Reports Module EEO ReportsEPSS 0.3%CVE-2026-112786MEDIUMOpenCATS before 0.10.0 Missing Authorization via Import Revert ActionEPSS 0.3%
References
https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/testEmailSettings.phphttps://github.com/opencats/OpenCATS/commit/aa3b414c3672f5010ca26c44192aa8e72d3735bdhttps://github.com/opencats/OpenCATS/issues/720https://github.com/opencats/OpenCATS/releases/tag/v0.10.0https://www.vulncheck.com/advisories/opencats-before-0.10.0-missing-authorization-via-ajax-testemailsettings-php