What is CVE-2026-91849?

CVE-2026-91849 is a medium-severity vulnerability in Wuzhicms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-09-15.

How severe is CVE-2026-91849?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Arbitrary file upload in Wuzhicms

CVE-2026-91849

A security flaw has been discovered in WuzhiCMS up to 4.1.0. This affects the function member::setAvatar of the file /index.php?m=member&f=user&v=setAvatar of the component Avatar Upload. The manipulation of the argument File results in unrestricted upload. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

N/a Wuzhicms — versions 4.0, 4.1.0

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-91849?: CVE-2026-91849 is a medium-severity vulnerability in Wuzhicms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-09-15.
How severe is CVE-2026-91849?: Medium severity. CVSS v3 base score is 6.3 out of 10.