Multiple cross-site scripting (XSS) vulnerabilities in Serendipity (s9y) 1.0.1 and earlier allow remote attackers to inject arbitrary web script or HTML via unspecified vectors in the media manager administration page.

SQL injection vulnerability in index.php in Serendipity 1.1.1 allows remote attackers to execute arbitrary SQL commands via the serendipity[multiCat][] parameter.

The "Extended properties for entries" (entryproperties) plugin in serendipity_event_entryproperties.php in Serendipity 1.1.3 allows remote authenticated users to bypass password protection and "deliver custom entryproperties settings to the Serendipity Frontend" via a certain request that modifies the password being checked.

Cross-site request forgery (CSRF) vulnerability in the mycalendar plugin before 0.13 for Serendipity allows remote attackers to perform actions as blog administrators, which can be leveraged to conduct cross-site scripting (XSS) attacks on the blog page.

Cross-site scripting (XSS) vulnerability in Serendipity (S9Y) before 1.3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to received trackbacks.

Serendipity 2.5.0 Remote Code Execution via Authenticated Media Upload

Serendipity 2.5.0 contains a remote code execution vulnerability that allows authenticated administrators to upload malicious PHP files through the media upload functionality. Attackers can exploit the file upload mechanism by creating a PHP shell with a command execution form that enables arbitrary system command execution on the web server.