Quick answers
- Is CVE-2026-76546 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-76546 being exploited in the wild.
- How severe is CVE-2026-76546?
- Medium severity, with a CVSS score of 6.8, published 29 August 2026.
- Which products and versions are affected?
- Cozmoslabs User Profile Builder before 4.0.1.
- Is there a fix for CVE-2026-76546?
- A patch was published on 2026: version 4.0.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-76546 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-76546?
- Check whether you run Cozmoslabs User Profile Builder 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
This is a Stored Cross-Site Scripting (XSS) vulnerability in the wppb-format-date shortcode of User Profile Builder. The root cause is insufficient output escaping of the shortcode's date and format attributes. The vulnerability exploits a timing window in WordPress shortcode processing: post content is sanitized at save time (before the shortcode is rendered), but shortcode attributes containing escaped entities like \x3c and \x3e are expanded at render time, bypassing the initial sanitization. A contributor (the minimum role needed to create posts) can craft a malicious shortcode and store it in post content; when any user (including administrators) views the post, the unescaped XSS payload executes in their browser session. The shortcode is disabled by default, requiring administrator enablement. Fixed in version 4.0.1.
Affected products
- Cozmoslabs User Profile Builder before 4.0.1
Timeline
- 2026-08-27: disclosed
- 2026: patched: version 4.0.1 released