WordPress B2BKing Premium plugin <= 5.6.07 - Cross Site Scripting (XSS) vulnerability

published 2026-08-20 2 mo ago modified 2026-08-20 2 mo ago also EUVD-2026-63340

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

Unauthenticated Cross Site Scripting (XSS) in B2BKing Premium <= 5.6.07 versions.

Patch / fix

fixed in 1

Kingtech LLC. B2BKing Premium 5.6.08

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 mo ago (2026-08-20)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected products

Kingtech LLC. B2BKing Premium

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/b2bking/vulnerability/wordpress-b2bking-premium-plugin-5-6-07-cross-site-scripting-
vdb-entry

Sources

CVE List CVE-2026-66598
NVD CVE-2026-66598

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.

Summary