Simple Membership has contributor-level broken access control
Simple Membership through 4.8.2 has broken access control requiring Contributor access according to the description. The disclosed class is a missing or inadequate authorization boundary; the protected data or operation is not named. The CNA vector indicates limited integrity impact without victim interaction. The export does not identify an endpoint, action, function or concrete data fields, so a specific exploit sequence cannot be established. The description requires Contributor access, but the CVSS vector says no privileges; this review retains the explicit role requirement and flags the inconsistency rather than asserting anonymous exploitation. The affected-version data marks 4.8.3 unaffected.
- Component
- Simple Membership
- Plugin slug
simple-membership- Affected
- n/a through 4.8.2
- Safe version
4.8.3- Published
- Sep 17, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 17, 2026 and is one of 34 known issues for this plugin.
Update, patch or deactivate.
Update Simple Membership to 4.8.3 or later. Enforce server-side authorization at the affected operation and on each requested object before returning data or applying a change. Derive permitted scope from the authenticated identity, not a caller-supplied identifier or role.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
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.
Technical description
Contributor Broken Access Control in Simple Membership <= 4.8.2 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N