# CVE-2024-10924: Really Simple Security (Free, Pro, and Pro Multisite) 9.0.0 - 9.1.1.1 - Authentication Bypass

- Exploited (CISA KEV): no
- Published: 2024-11-15
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 82.2% (100th percentile)
- CWE: CWE-288

The Really Simple Security (Free, Pro, and Pro Multisite) plugins for WordPress are vulnerable to authentication bypass in versions 9.0.0 to 9.1.1.1. This is due to improper user check error handling in the two-factor REST API actions with the 'check_login_and_get_user' function. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, when the "Two-Factor Authentication" setting is enabled (disabled by default).

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2025-01-06 | 52 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-01-21 | 67 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2025-01-06 · new · rule 6bd9b07c8acc4beeb17c8bee58ae3c89 · default Block
  > Really Simple Security - Auth Bypass - CVE:CVE-2024-10924. Previous action: Log. New action: Block. New Detection
  Source: https://developers.cloudflare.com/changelog/post/2025-01-06-waf-release/

### F5

- 2025-01-21 · new · rule 200013101
  > Added: signature 200013101 "WordPress Really Simple Security Plugin Authentication Bypass" (Authentication/Authorization Attacks, risk High), systems: WordPress. References: CVE-2024-10924.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-03-11 · new · rule 200013101
  > Added: signature 200013101 "WordPress Really Simple Security Plugin Authentication Bypass" (Authentication/Authorization Attacks, risk High), systems: WordPress. References: CVE-2024-10924.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2026-07-07 · updated · rule 200013101
  > Updated: signature 200013101 "WordPress Really Simple Security Plugin Authentication Bypass" (Authentication/Authorization Attacks, risk High), systems: WordPress. References: CVE-2024-10924.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: passed (0 of 3 requests blocked), template CVE-2024-10924, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: passed (0 of 3 requests blocked), template CVE-2024-10924, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2024-10924 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2024-10924