WordPress Fusion Builder plugin <= 3.15.4 - Privilege Escalation vulnerability

published 2026-06-26 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39685

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

Contributor Privilege Escalation in Fusion Builder <= 3.15.4 versions.

Patch / fix

fixed in 1

ThemeFusion Fusion Builder 3.15.5

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 4 mo ago (2026-06-29)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% 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

ThemeFusion Fusion Builder

Classification

Weakness

CWE-266 Incorrect Privilege Assignment

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/fusion-builder/vulnerability/wordpress-fusion-builder-plugin-3-15-4-privilege-escal
vdb-entry

Sources

CVE List CVE-2026-56008
NVD CVE-2026-56008

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary