CVE-2026-1461 json
Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values
published 2026-02-19 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-7795
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured, which is empty by default. This makes it possible for unauthenticated attackers to forge Stripe webhook events to manipulate membership subscriptions, including reactivating expired memberships without payment or canceling legitimate subscriptions, potentially leading to unauthorized access and service disruption.
Patch / fix
- simple-membership-plugin simple_membership 4.7.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected products
- wpinsider-1 Simple Membership
Classification
- Weakness
-
- CWE-230 Improper Handling of Missing Values
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4e4df9a6-8f7d-428b-a596-0751ca047169?source=cve
- plugins.trac.wordpress.org /browser/simple-membership/trunk/ipn/swpm-stripe-webhook-handler.php#L26
- plugins.trac.wordpress.org /browser/simple-membership/trunk/classes/class.swpm-wp-loaded-tasks.php#L90
- plugins.trac.wordpress.org /changeset/3453404/
Sources
- CVE List CVE-2026-1461
- NVD CVE-2026-1461
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.