The Kaltura HTML5 player (mwEmbed / html5lib) contains a local file disclosure vulnerability due to improper validation of the ServiceUrl parameter in mwEmbedLoader.php. This parameter is used as the base URL for a backend request and accepts non‑HTTP schemes such as file://. When an exception or error occurs, the response is subsequently deserialized and its raw contents are reflected to the client in an error message; this enables an unauthenticated, remote attacker to read any arbitrary internal file reachable by the server. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.

The Kaltura HTML5 player (mwEmbed / html5lib) contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize(), and the resulting object’s fields are written to a cache path derived from attacker‑supplied uiconfid without proper path validation. An attacker can write arbitrary files into web‑accessible locations and achieve code execution as the webserver user. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.

A remote code execution vulnerability exists in Kaltura versions prior to 11.1.0-2 due to unsafe deserialization of user-controlled data within the keditorservices module. An unauthenticated remote attacker can exploit this issue by sending a specially crafted serialized PHP object in the kdata GET parameter to the redirectWidgetCmd endpoint. Successful exploitation leads to execution of arbitrary PHP code in the context of the web server process.

A vulnerability was found in kaltura mwEmbed up to 2.91. It has been rated as problematic. Affected by this issue is some unknown functionality of the file modules/KalturaSupport/components/share/share.js of the component Share Plugin. The manipulation of the argument res leads to cross site scripting. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 2.92.rc1 is able to address this issue. The name of the patch is 4f11b6f6610acd6d89de5f8be47cf7c610643845. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-217664.

A vulnerability was found in Kaltura mwEmbed up to 2.96.rc1 and classified as problematic. This issue affects some unknown processing of the file includes/DefaultSettings.php. The manipulation of the argument HTTPXFORWARDEDHOST leads to cross site scripting. The attack may be initiated remotely. Upgrading to version 2.96.rc2 is able to address this issue. The patch is named 13b8812ebc8c9fa034eed91ab35ba8423a528c0b. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-217427.

The getUserzoneCookie function in Kaltura before 13.2.0 uses a hardcoded cookie secret to validate cookie signatures, which allows remote attackers to bypass an intended protection mechanism and consequently conduct PHP object injection attacks and execute arbitrary PHP code via a crafted userzone cookie.

The wikidecode Developer System Helper function in the admin panel in Kaltura before 13.2.0 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object.

Multiple cross-site scripting (XSS) vulnerabilities in Kaltura before 13.2.0 allow remote attackers to inject arbitrary web script or HTML via the (1) partnerId or (2) playerVersion parameter to server/adminconsole/web/tools/bigRedButton.php; the (3) partnerId, (4) playerVersion, (5) secret, (6) entryId, (7) adminUiConfId, or (8) uiConfId parameter to server/adminconsole/web/tools/bigRedButtonPtsPoc.php; the (9) streamUsername, (10) streamPassword, (11) streamRemoteId, (12) streamRemoteBackupId, or (13) entryId parameter to server/adminconsole/web/tools/AkamaiBroadcaster.php; the (14) entryId parameter to server/adminconsole/web/tools/XmlJWPlayer.php; or the (15) partnerId or (16) playerVersion parameter to server/alpha/web/lib/bigRedButtonPtsPocHlsjs.php.

An issue was discovered in Kaltura server Lynx-12.11.0. The vulnerability exists due to insufficient filtration of user-supplied data passed to the "adminconsole/web/tools/SimpleJWPlayer.php" URL, the "adminconsole/web/tools/AkamaiBroadcaster.php" URL, the "adminconsole/web/tools/bigRedButton.php" URL, and the "adminconsole/web/tools/bigRedButtonPtsPoc.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.

An issue was discovered in Kaltura server Lynx-12.11.0. The vulnerability exists due to insufficient filtration of user-supplied data passed to the "server-Lynx-12.11.0/adminconsole/web/tools/XmlJWPlayer.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.