CVE-2026-88824Master Blocks 1.4.1 - 1.4.1.4 - Unauthenticated Stored XSS via White Label Settings
Updated under an hour ago ()
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It affects Unknown Master Blocks. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The Master Blocks WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Sep 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown Master Blocks unknown:master_blocks (from the name) | from 1.4.1 before 1.5.0 | CNA record |
References
- https://wpscan.com/vulnerability/898fda0a-4d27-4def-ae6f-35bf25a8ae8d/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.