What is CVE-2026-9357?

CVE-2026-9357 is a low-severity vulnerability in Vbulletin, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-05-24.

How severe is CVE-2026-9357?

Low severity. CVSS v3 base score is 3.5 out of 10.

RCE in Vbulletin

CVE-2026-9357

A vulnerability was found in vBulletin 6.x. This impacts an unknown function of the component Login. Performing a manipulation results in cross site scripting. It is possible to initiate the attack remotely. The exploit has been made publi…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

N/a Vbulletin — versions 6.*

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-94 — Code Injection

References

cna@vuldb.com (vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-9357?: CVE-2026-9357 is a low-severity vulnerability in Vbulletin, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-05-24.
How severe is CVE-2026-9357?: Low severity. CVSS v3 base score is 3.5 out of 10.