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CVE-2026-88764mediumCWE-269

Simple Membership < 4.7.8 - Subscriber+ Membership Level Escalation via PayPal Standard subsc_ref

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.4epss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.