Quick answers
- Is CVE-2026-103519 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103519 being exploited in the wild.
- How severe is CVE-2026-103519?
- Medium severity, with a CVSS score of 5.4, published 3 October 2026.
- Which products and versions are affected?
- WP Ultimate Review up to and including 2.4.3.
- Is there a fix for CVE-2026-103519?
- 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.
- How is CVE-2026-103519 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-103519?
- Check whether you run WP Ultimate Review 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.
Technical details
The plugin fails to properly validate shortcode input in an action handler before calling do_shortcode(). An authenticated attacker with subscriber or higher privileges can bypass the strip_shortcodes() sanitization by using double-bracket syntax [[tag]] which unwraps to [tag] and persists through post storage. The vulnerable shortcode executes when the xs_review custom post type is rendered via the_content hook.
Affected products
- WP Ultimate Review WP Ultimate Review up to and including 2.4.3
Timeline
- 2026-10-03: disclosed