Unknown Really Simple Security vulnerabilities

4 CVEs affecting Unknown Really Simple Security, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-88798, published 2026-09-18.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2026-81766, published 2026-08-30. Medium severity, CVSS 6.6. EPSS: 0.4% chance of exploitation in the next 30 days. The Really Simple Security WordPress plugin before 9.8.0 does not check that the user is allowed to install Really Simple Security WordPress plugin before 9.8.0 before installing one from a…
CVE-2026-88798, published 2026-09-18. Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days. The Really Simple Security WordPress plugin before 9.8.3 does not validate a client-supplied address value before using it as a storage key in one of its own options, allowing unauthenticated…
CVE-2026-8293, published 2026-06-02. High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days. The Really Simple Security WordPress plugin before 9.5.10.1 does not enforce the second-factor challenge in two of its two-factor authentication REST endpoints, allowing an attacker who knows a…
CVE-2026-89080, published 2026-09-13. High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days. The Really Simple Security WordPress plugin before 9.8.1 does not prevent an unauthenticated request from resetting an account's completed email two-factor enrolment, allowing an attacker who…