Really Simple Security (Free, Pro, and Pro Multisite) 9.0.0 — 9.1.1.1 - Authentication Bypass
CVE-2024-10924Published · Updated Action summary
Really Simple Security Pro: Affected: 9.0.0 – 9.1.1.1Update to 9.1.2 or newer
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL): Affected: 9.0.0 – 9.1.1.1Update to 9.1.2 or newer
Really Simple Security Pro multisite: Affected: 9.0.0 – 9.1.1.1Update to 9.1.2 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Really Simple Security Pro really-simple-ssl-pro
- Affected9.0.0 – 9.1.1.1
- Patched in9.1.2
Update to 9.1.2 or newer.
You are affected if you run 9.0.0 – 9.1.1.1. Version 9.1.2 and later are not affected by this issue.
Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) really-simple-ssl
- Affected9.0.0 – 9.1.1.1
- Patched in9.1.2
Update to 9.1.2 or newer.
You are affected if you run 9.0.0 – 9.1.1.1. Version 9.1.2 and later are not affected by this issue.
Really Simple Security Pro multisite really-simple-ssl-pro-multisite
- Affected9.0.0 – 9.1.1.1
- Patched in9.1.2
Update to 9.1.2 or newer.
You are affected if you run 9.0.0 – 9.1.1.1. Version 9.1.2 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Really Simple Security Pro.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 9.1.2, or a newer patched version
- Update to version 9.1.2, or a newer patched version
- Update to version 9.1.2, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Really Simple Security Pro to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to István Márton.
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).
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Really Simple Security Pro
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Authenticated (Subscriber+) Insecure Direct Object Reference ≤9.5.4.0Update to 9.5.4.1 | CVE-2026-27397 |
- Medium4.3Authenticated (Subscriber+) Insecure Direct Object Reference
≤9.5.4.0Update to 9.5.4.1
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.