Quick answers
- Is CVE-2026-89138 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-89138 being exploited in the wild.
- How severe is CVE-2026-89138?
- Medium severity, with a CVSS score of 4.3, published 18 September 2026.
- Which products and versions are affected?
- Wordpress Filter Gallery up to 1.1.4.
- Is there a fix for CVE-2026-89138?
- 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-2026-89138 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-89138?
- Check whether you run Wordpress Filter Gallery 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 Filter Gallery plugin for WordPress contains an authorization bypass vulnerability due to insufficient permission checks on sensitive operations. Authenticated attackers with subscriber-level privileges can exploit this flaw to overwrite post titles and content, modify the _wp_attachment_image_alt meta key on arbitrary posts, and create or overwrite arbitrary ufg_gallery_* options. The vulnerability affects all versions up to and including 1.1.4. The attack requires prior authentication but allows privilege escalation through inadequate capability verification before performing administrative actions.
Affected products
- WordPress Filter Gallery up to 1.1.4
Timeline
- 2026-09-18: disclosed