8.8

CVE-2026-1560: nko custom block builder – lazy blocks Code Injection

CVSS: 8.8v3.1HighDeferred
Published 11-02-2026Last modified 08-04-2026
Open JSON

Vulnerability summary

CVE-2026-1560 is a high (CVSS 8.8) Code Injection vulnerability in nko custom block builder – lazy blocks. EPSS estimates a 9.44% chance of exploitation in the next 30 days, higher than 95.4% of scored vulnerabilities. Fixed in 4.2.1.

Overall risk
37/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
9.44%
0%100%
Low · +0.52 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-02-2026
    PublishedVulnerability first disclosed.
  2. 08-04-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

9.44%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

+0.52 pp

From 8.92% on 21-09-2026

21-09-202621-10-2026
EPSS score
9.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nko1 product
Wordpress1 product
  • lazy-blocks≤ 4.2.0 (fixed in 4.2.1)

2 vendors · 2 products

References

6 links