CVE-2026-15302

ARMember <= 4.0.27 - Directory Traversal via X-FILENAME

2024-04-04 00:00

Strategic Overview

Status: Patched in 4.0.28
Affected Plugin: ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup
Affected Version: <= 4.0.27
CVSS: 5.3Medium
Weakness type: CWE-36 · Absolute Path Traversal
CVE: CVE-2026-15302

View all ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup vulnerabilities

At a glance

CVE-2026-15302 is a medium-severity Absolute Path Traversal vulnerability in the ARMember WordPress plugin, affecting versions <= 4.0.27. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.0.28; sites on affected versions should update now. Disclosed April 2024, reported by Lucio Sá.

Vulnerability Overview

The ARMember plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 4.0.27 via the 'X-FILENAME' HTTP header. This makes it possible for unauthenticated attackers to upload and overwrite certain files (e.g., CSS) to directories outside the 'wp-content/uploads/armember' directory.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-36: Absolute Path Traversal

The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as /abs/path that can resolve to a location that is outside of that directory.

Remediation

Update to version 4.0.28, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to ARMember: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ARMember 4.0.28 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-15302 https://www.wordfence.com/threat-intel/vulnerabilities/id/2c8734f5-4d23-454d-bf00-6e9d36982098 https://nvd.nist.gov/vuln/detail/CVE-2026-15302

Related records

Other vulnerabilities in ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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