Description
Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect users to attacker-controlled hosts through the ratings plugin or other redirect callers.
Published: 2026-09-18
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 21 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 20 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Cotonti cotonti
Cotonti siena
Vendors & Products Cotonti cotonti
Cotonti siena

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect users to attacker-controlled hosts through the ratings plugin or other redirect callers.
Title Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex
First Time appeared Cotonti
Cotonti cotonti Siena
Weaknesses CWE-601
CPEs cpe:2.3:a:cotonti:cotonti_siena:*:*:*:*:*:*:*:*
Vendors & Products Cotonti
Cotonti cotonti Siena
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}


Subscriptions

Cotonti Cotonti Cotonti Siena Siena
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-21T15:16:25.853Z

Reserved: 2026-09-18T19:39:36.562Z

Link: CVE-2026-93869

cve-icon Vulnrichment

Updated: 2026-09-21T15:15:37.667Z

cve-icon NVD

Status : Received

Published: 2026-09-18T20:17:34.787

Modified: 2026-09-21T16:17:28.240

Link: CVE-2026-93869

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T00:00:12Z

Weaknesses