Answer in brief
CVE-2026-11855 records a High severity (CVSS 8.8) vulnerability in Simple Membership < 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version. The current sources do not mark it as known exploited. The current feed maps Unknown/Simple Membership (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/Simple Membership (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Simple Membershipgeneric | >=0 <4.7.5 | 4.7.5 |
Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 6, 2026
The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe webhook requests when no signing secret is configured, nor escape a value taken from them before outputting it in an administrator notice, allowing unauthenticated attackers to inject arbitrary web scripts that execute in the context of a logged-in administrator.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-11855 records a High severity (CVSS 8.8) vulnerability in Simple Membership < 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version. The current sources do not mark it as known exploited. The current feed maps Unknown/Simple Membership (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Unknown/Simple Membership (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Simple Membershipgeneric | >=0 <4.7.5 | 4.7.5 |
Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 6, 2026
The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe webhook requests when no signing secret is configured, nor escape a value taken from them before outputting it in an administrator notice, allowing unauthenticated attackers to inject arbitrary web scripts that execute in the context of a logged-in administrator.
Quoted source text, attributed separately from HOL analysis.