Really Simple Security (Free, Pro, and Pro Multisite) 9.0.0 - 9.1.1.1 - Authentication Bypass
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).
- Published
- Nov 15, 2024
- Updated
- Jun 17, 2026
- EPSS
- 82.2% · 100th percentile
- CWE
- CWE-288
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Report tools
Action score
64
This week
Don’t wait for the next maintenance window.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 25 / 30 · 82.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 9.8
- CNA · Wordfence
- 9.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| really-simple-plugins | really simple security | cpe:2.3:a:really-simple-plugins:really_simple_security |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- really-simple-plugins really simple security9.0.0 and later · before 9.1.2
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Wordfence). Independent of NVD's CPE analysis and usually ahead of it.
Really Simple Plugins Really Simple Security Pro
- 9.0.0 and later · up to and including 9.1.1.1affected · semver
Really Simple Plugins Really Simple Security Pro multisite
- 9.0.0 and later · up to and including 9.1.1.1affected · semver
rogierlankhorst Really Simple Security – Simple and Performant Security (formerly Really Simple SSL)
- 9.0.0 and later · up to and including 9.1.1.1affected · semver
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×19
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | webapps | 2025-04-15 |
| Metasploit module | exploit/multi/http/wp_reallysimplessl_2fa_bypass_rceWordPress Really Simple SSL Plugin Authentication Bypass to RCEexploit | 2024-11-14 |
| Nuclei detection template | Nuclei template CVE-2024-10924 | — |
| Proof-of-concept repository on GitHub | stars:4 | 2024-11-14 |
| Proof-of-concept repository on GitHub | stars:8 | 2024-11-18 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-11-19 |
| Proof-of-concept repository on GitHub | stars:20 | 2024-11-19 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-11-20 |
| Proof-of-concept repository on GitHub | stars:3 | 2024-11-20 |
| Proof-of-concept repository on GitHub | stars:7 | 2024-11-27 |
| Proof-of-concept repository on GitHub | stars:4 | 2024-12-01 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-12-03 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-1 d
- Metasploit-1 d
- Published
- TodaySep 29, 2026+684 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-288 · Authentication Bypass Using an Alternate Path or ChannelCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- plugins.trac.wordpress.org/browser/really-simple-ssl/tags/9.1.1.1/security/wordpress/two-fa/class-rsssl-two-factor-on-board-api.php#L277
- plugins.trac.wordpress.org/browser/really-simple-ssl/tags/9.1.1.1/security/wordpress/two-fa/class-rsssl-two-factor-on-board-api.php#L278
- plugins.trac.wordpress.org/browser/really-simple-ssl/tags/9.1.1.1/security/wordpress/two-fa/class-rsssl-two-factor-on-board-api.php#L67
- plugins.trac.wordpress.org/changeset/3188431/really-simple-ssl
- www.wordfence.com/blog/2024/11/really-simple-security-vulnerability/
- www.wordfence.com/threat-intel/vulnerabilities/id/7d5d05ad-1a7a-43d2-bbbf-597e975446be?source=cve
- github.com/JoshuaProvoste/0-click-RCE-Exploit-for-CVE-2024-10924
Vendor advisories and official records. Exploit/PoC links are deliberately left out.