cvedb.io
CVE-2026-48821
MEDIUM · CVSS 5.8
EPSS exploitation probability: 0%
Published 2026-06-17T21:16:23.247 · Last modified 2026-06-23T15:44:39.343

Summary

Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a DOM-based Cross-Site Scripting (XSS) vulnerability in the Thumbnail Synchronizer feature. When an administrator runs the thumbnail update process, malicious bookmark titles are returned via an AJAX response and inserted into the DOM using innerHTML without proper sanitization. The issue originates from the interaction between the backend thumbnail update endpoint and the frontend JavaScript responsible for rendering update progress. On the backend, the ThumbnailsController::ajaxUpdate method returns bookmark data formatted using the 'raw' formatter. This includes the unescaped bookmark title in the JSON response. On the client side, the script thumbnails-update.js processes this AJAX response and dynamically upd

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.