Description
Cotonti through 1.0.0 contains an open redirect vulnerability in message.php that base64-decodes the redirect parameter without domain validation. Unauthenticated attackers can craft malicious links with encoded external URLs to redirect users to arbitrary sites via meta refresh tags for phishing attacks.
Published: 2026-09-26
Score: 5.1 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 26 Sep 2026 01:15:00 +0000

Type Values Removed Values Added
Description Cotonti through 1.0.0 contains an open redirect vulnerability in message.php that base64-decodes the redirect parameter without domain validation. Unauthenticated attackers can craft malicious links with encoded external URLs to redirect users to arbitrary sites via meta refresh tags for phishing attacks.
Title Cotonti through 1.0.0 Open Redirect via message.php redirect parameter
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': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Subscriptions

Cotonti Cotonti Siena
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-26T00:59:24.331Z

Reserved: 2026-09-26T00:48:22.887Z

Link: CVE-2026-100523

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-26T01:17:00.870

Modified: 2026-09-26T01:17:00.993

Link: CVE-2026-100523

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-601

    URL Redirection to Untrusted Site ('Open Redirect')