YOURLS is vulnerable to XSS through JSONP and Callback request parameters

Severity: low · CVSS 3.1 · Published 2025-12-30

YOURLS is vulnerable to XSS through JSONP and Callback request parameters

Technologies: yourls/yourls (Packagist). Vendors: Packagist.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
Low severity, with a CVSS score of 3.1, published 30 December 2025.
Which products and versions are affected?
yourls/yourls (Packagist) ECOSYSTEM:introduced=0,last_affected=1.10.2.
Is there a fix for This vulnerability?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected?
Check whether you run yourls/yourls (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • yourls/yourls (Packagist) ECOSYSTEM:introduced=0,last_affected=1.10.2

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