CVE-2026-93871 json
Cotonti through 1.0.0 Stored Open Redirect via Page redir: Prefix
published 2026-09-18 51 d ago modified 2026-09-24 45 d ago also EUVD-2026-83368
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/Cotonti/Cotonti#1901 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 48 d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.1 | 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 |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| CNA | 4.0 | 5.1 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Cotonti Cotonti
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/Cotonti/Cotonti/pull/1901
patch, issue-tracking
-
github.com
/Cotonti/Cotonti/issues/1893
issue-tracking
-
github.com
/Cotonti/Cotonti/blob/1.0.0/modules/page/inc/page.main.php
technical-description
-
github.com
/Cotonti/Cotonti
product
-
vulncheck.com
/advisories/cotonti-through-1.0.0-stored-open-redirect-via-page-redir-prefix
third-party-advisory
Sources
- CVE List CVE-2026-93871
- NVD CVE-2026-93871
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.