CVE-2024-12878
Custom Block Builder – Lazy Blocks < 3.8.3 - Reflected XSS
Vexday Risk Score
36Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 7.1EPSS 0.6%KEV nãoPoC —Nuclei simMetasploit —Patch —
Lifecycle
26 Feb 2025Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Affected products
Unknown · Custom Block Builder