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CVE-2026-11855

HIGH Exploitation: PoC
8.8
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-11855
State
PUBLISHED
Assigner
WPScan
Reserved
2026-06-10 08:56 UTC
Published
2026-07-06 06:00 UTC
Last updated
2026-07-06 12:01 UTC
Vendor / Product
Unknown / Simple Membership
Sources
cve.org  ·  NVD

Severity & Metrics

8.8 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Unknown Simple Membership — 0 < 4.7.5
Weakness (CWE)
CWESourceDescription
— cna CWE-79 Cross-Site Scripting (XSS)
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.8 HIGH 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References (1)
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