CVE-2026-67350
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
Jul 31, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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