Quick answers
- Is CVE-2026-76558 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-76558 being exploited in the wild.
- How severe is CVE-2026-76558?
- Medium severity, with a CVSS score of 6.8, published 16 September 2026.
- Which products and versions are affected?
- WP Import Export Lite WP Import Export Lite before 3.9.33.
- Is there a fix for CVE-2026-76558?
- A patch was published on 2026-09-16: Fixed in version 3.9.33 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-76558 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-76558?
- Check whether anything you run is named in the advisory. 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 vulnerability is a Stored Cross-Site Scripting (XSS) flaw (CWE-79) in the WP Import Export Lite plugin before version 3.9.33. The root cause is the failure to escape custom field names retrieved from the database before inserting them into the DOM of an administration screen. An attacker with contributor-level privileges can craft malicious field names containing JavaScript code and save them to the database. When an administrator visits the affected admin screen, the unescaped payload executes in their browser context, potentially allowing session hijacking or account compromise. The vulnerability has been fixed in version 3.9.33.
Affected products
- WP Import Export Lite WP Import Export Lite before 3.9.33
Timeline
- 2026-09-14: disclosed
- 2026-09-16: advisory
- 2026-09-16: patched: Fixed in version 3.9.33