Cross-site Scripting (XSS) Affecting shaarli package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-SHAARLI-17375097
- published18 Jun 2026
- disclosed20 Aug 2026
Introduced: 18 Jun 2026
CVE-2026-50190 (opens in a new tab)How to fix?
There is no fixed version for Debian:unstable shaarli.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shaarli package and not the shaarli package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Shaarli is a personal bookmarking service. Versions prior to 0.16.3 are vulnerable to stored XSS in application/front/controller/visitor/BookmarkListController.php. The permalink handler concatenates the raw $bookmark->getTitle() into the pagetitle template variable and the RainTPL template emits it into the document <title> element without HTML escaping. A bookmark title containing </title><script>...</script> closes the document title early and the injected script executes in the Shaarli origin for any visitor of /shaare/{hash}. Shaarli's metadata fetcher copies a remote page's <title> text verbatim into the local bookmark title, so an attacker who hosts an attacker-controlled URL and convinces an administrator to bookmark it plants the payload with no further interaction — and the resulting permalink fires for every visitor including the administrator on first save, providing a one-shot administrator account takeover. Version 0.16.3 fixes the issue.