CVE-2026-100523Cotonti through 1.0.0 Open Redirect via message.php redirect parameter
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-601
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cotonti Cotonti cotonti:cotonti (from the name) | through 1.0.0 | CNA record |
References
- https://github.com/Cotonti/Cotonti/issues/1907issue-tracking
- https://github.com/Cotonti/Cotonti/pull/1908issue-tracking, patch
- https://github.com/Cotonti/Cotonti/blob/1.0.0/message.phptechnical-description
- https://github.com/Cotonti/Cotonti/blob/1.0.0/system/common.phptechnical-description
- https://github.com/Cotonti/Cotontiproduct
- https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-message-php-redirect-parameterthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.