Anddone

**Name of the Vulnerable Software and Affected Versions** html5lib versions 2.x and earlier **Description** The Kaltura HTML5 player (mwEmbed / html5lib) contains an unauthenticated remote code execution issue resulting from unsafe data deserialization and unsanitized filesystem path construction. The endpoint 'mwEmbedLoader.php' accepts a user-controlled `ServiceUrl` parameter, the response of which is processed by the `unserialize()` function. Subsequently, the fields of the resulting object are written to a cache path derived from the attacker-supplied `uiconf id` variable without proper path validation. This allows an attacker to write arbitrary files into web-accessible locations and execute code with the privileges of the webserver user. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.