CVE-2026-67350
Serendipity < 2.6.1 Open Redirect via exit.php
- State
- Published
- Severity
- 2.1 Low
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Reserved
- Jul 29, 2026
Description
Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y. Attackers can craft trusted-looking URLs leveraging the legitimate blog domain to conduct phishing, deliver malware, or bypass URL reputation filters.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Affected Products
| Product | Versions |
|---|---|
Serendipitys9y |
|
References
- GitHub Security Advisory (GHSA-77rw-27c5-4hxm)vendor-advisory
- https://www.vulncheck.com/advisories/serendipity-open-redirect-via-exit-phpthird-party-advisory
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