CVE-2026-93871: medium-severity vulnerability in Cotonti
Cotonti through 1.0.0 Stored Open Redirect via Page redir: Prefix
Published · Updated
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 5.1epss 0.3%
Cotonti through 1.0.0 fails to validate redirect destinations in page bodies prefixed with redir:, allowing authenticated users with page creation or edit permissions to store redirects to arbitrary external hosts. Attackers can craft pages on trusted domains that redirect visitors to malicious sites for phishing attacks without administrative privileges.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Affected products
Cotonti · CotontiRelated CVEs — Cotonti
In the same product, most dangerous first.
CVE-2026-91939CRITICALCotonti 1.0.0 Comments Plugin PHP Object Injection via ci ParameterEPSS 1.0%CVE-2026-93868CRITICALCotonti through 1.0.0 Predictable Password Recovery Token via Weak PRNGEPSS 0.7%CVE-2026-93872HIGHCotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb ParameterEPSS 0.7%CVE-2026-71294HIGHCotonti CMS Comments Plugin PHP Object Injection via Unrestricted unserialize() in Create/Edit ActionsEPSS 0.4%CVE-2026-93869MEDIUMCotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() RegexEPSS 0.4%CVE-2026-58143HIGHCotonti Siena 0.9.26 CSRF via admin.php Config Update EndpointEPSS 0.2%
References
https://github.com/Cotonti/Cotontihttps://github.com/Cotonti/Cotonti/blob/1.0.0/modules/page/inc/page.main.phphttps://github.com/Cotonti/Cotonti/issues/1893https://github.com/Cotonti/Cotonti/pull/1901https://www.vulncheck.com/advisories/cotonti-through-1.0.0-stored-open-redirect-via-page-redir-prefix