Shaarli up to 0.16.1 Tag Filtering Interface day cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Shaarli up to 0.16.1. The affected element is an unknown function of the component Tag Filtering Interface. Executing a manipulation of the argument day can lead to cross site scripting. This vulnerability is handled as CVE-2026-48823. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Shaarli up to 0.16.1 and classified as problematic. This vulnerability affects some unknown functionality of the component Tag Filtering Interface. The manipulation of the argument tag with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the tag filtering functionality of Shaarli. An authenticated user can inject arbitrary JavaScript into the tags field when creating a bookmark (Shaare). The malicious payload is stored and later executed when users interact with the "Filter by tag" search feature on the homepage. User-supplied input in the tags field is not properly sanitized or output-escaped before being rendered in the tag filtering interface. When a bookmark is created with a malicious payload inside the tag field, the payload is stored in the database. Later, when a user searches using the "Filter by tag" functionality on the homepage, the application renders matching tags dynamically. If the tag value contains HTML with JavaScript event handlers, it is injected into the DOM. This impacts anyone interacting with the "Filter by tag" search functionality, administrators and privileged users. This issue has been fixed in version 0.16.2.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-48823 since 05/22/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 0.16.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Name

• Shaarli

Version

• 0.16.0
• 0.16.1

Website

• Product: https://github.com/shaarli/Shaarli/

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