Security readout for executives and security teams
Plain-English summary
CVE-2026-1461 affects the Simple Membership WordPress plugin through version 4.7.0. If Stripe webhook signing is not configured, which the report says is empty by default, an unauthenticated attacker could forge payment events. This could improperly reactivate expired memberships or cancel valid ones, causing unauthorized access or service disruption.
Executive priority
Treat as a near-term fix for membership or subscription sites using this plugin with Stripe. The likely business impact is unpaid access or disruption to legitimate subscribers, not full site takeover based on current sources.
Technical view
The issue is improper handling of missing values in the Stripe webhook handler. Signature validation occurs only when the stripe-webhook-signing-secret setting is configured. With that value empty, unauthenticated network attackers can submit forged Stripe webhook events affecting membership subscription state. CVSS is 6.5, AV:N/AC:L/PR:N/UI:N.
Likely exposure
WordPress sites using Simple Membership through 4.7.0 and Stripe webhooks are the likely exposure. Risk is higher where the Stripe webhook signing secret is blank or unset. Sites not using this plugin or not using its Stripe webhook flow are less likely exposed based on the provided sources.
Exploitation context
No active exploitation is stated in the provided sources, and the CVE is not marked KEV. The weakness is remotely reachable and unauthenticated, but the impact appears focused on membership integrity and limited confidentiality through improper access to membership-gated content.
Researcher notes
The CVE description says all versions up to 4.7.0 are affected, while the structured affected entry is not clearly useful. The referenced WordPress Trac files and changeset should be reviewed to confirm the exact code change and fixed release mapping.
Mitigation direction
- Check whether Simple Membership is installed and at or below version 4.7.0.
- Configure the Stripe webhook signing secret if Stripe webhooks are used.
- Update to a vendor-released version newer than 4.7.0 if available.
- Review vendor and WordPress plugin guidance for confirmed fixed versions.
Validation and detection
- Inventory WordPress sites for the Simple Membership plugin and version.
- Review plugin settings for an empty Stripe webhook signing secret.
- Check membership logs for unexpected reactivations, cancellations, or Stripe event discrepancies.
- Confirm Stripe webhook configuration matches vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-230: Exact CWE lookup
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Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-1461 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4e4df9a6-8f7d-428b-a596-0751ca047169?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/simple-membership/trunk/ipn/swpm-stripe-webhook-handler.php#L26CVE reference
- https://plugins.trac.wordpress.org/browser/simple-membership/trunk/classes/class.swpm-wp-loaded-tasks.php#L90CVE reference
- https://plugins.trac.wordpress.org/changeset/3453404/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Handling of Missing Values
Improper Handling of Missing Values represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.