ultimate-member: Filesystem traversal

ultimate-member is affected by filesystem traversal. Exploitation requires an authenticated WordPress account. A crafted path can escape the intended directory and reach files or directories elsewhere on the server. The published affected range is 2.1.3.

CVE / CNA score 6.8 CVSS 4.0 · disclosure@vulncheck.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: ultimate-member
Plugin slug: ultimate-member
Affected: 2.1.3
Safe version: See mitigation notes
Published: May 13, 2026
Weakness: CWE-98 — Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

This CVE was published May 13, 2026 and is one of 60 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update ultimate-member when a confirmed fixed release becomes available; until then, disable and remove it when the site's risk warrants.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

WordPress Plugin ultimate-member 2.1.3 contains a local file inclusion vulnerability that allows authenticated attackers to include arbitrary files by manipulating the pack parameter in class-admin-upgrade.php. Attackers can send POST requests with malicious pack values to include unintended PHP files from the packages directory and execute arbitrary code.

CVE / CNA vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Primary and upstream sources

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