CVE-2004-1620: CRLF injection vulnerability in Serendipity before 0.7rc1 allows remote attackers to perform HTTP Response...

Security readout for executives and security teams

Older Serendipity blog versions before 0.7rc1 could let a remote attacker inject line breaks into responses. That could let them alter what a visitor’s browser receives from the site, including expected HTML content. Exposure is likely limited to sites still running Serendipity before 0.7rc1. The bundle does not identify affected CPEs, deployment prevalence, or maintained package status. Treat as a legacy internet-facing web risk. It is not backed by active exploitation evidence in the bundle, but exposed obsolete Serendipity sites should be upgraded, retired, or isolated. Mitigation focus: Upgrade Serendipity installations before 0.7rc1 to 0.7rc1 or a supported maintained release.; If upgrade is not possible, remove public access to the affected Serendipity instance.; Check current vendor guidance before applying compensating controls or code changes..

Prepared

Jun 30, 2026, 00:10 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.