What is CVE-2024-12878?

CVE-2024-12878 is a high-severity vulnerability in Thedevoice Lazy Blocks, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2025-02-26.

How severe is CVE-2024-12878?

High severity. CVSS v3 base score is 7.1 out of 10.

Is CVE-2024-12878 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Thedevoice Lazy Blocks

CVE-2024-12878

The Custom Block Builder WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (44.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

Affected products

Thedevoice Lazy_blocks
Unknown Custom Block Builder — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

contact@wpscan.com (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2024-12878?: CVE-2024-12878 is a high-severity vulnerability in Thedevoice Lazy Blocks, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2025-02-26.
How severe is CVE-2024-12878?: High severity. CVSS v3 base score is 7.1 out of 10.
Is CVE-2024-12878 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.