CVE-2026-1560 in the critical feed json
Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
published 2026-02-11 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5960
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 10.4%
- EPSS 10.4% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.0 via multiple functions in the 'LazyBlocks_Blocks' class. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
10.39% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- nko Custom Block Builder – Lazy Blocks
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve
- plugins.trac.wordpress.org /browser/lazy-blocks/trunk/classes/class-rest.php#L88
- plugins.trac.wordpress.org /browser/lazy-blocks/trunk/classes/class-blocks.php#L1637
- plugins.trac.wordpress.org /browser/lazy-blocks/trunk/classes/class-blocks.php#L766
- plugins.trac.wordpress.org /changeset/3454012/
Sources
- CVE List CVE-2026-1560
- NVD CVE-2026-1560
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.