Formidable Forms < 6.3.1 - Subscriber+ Remote Code Execution
Priority HIGH 73Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The Formidable Forms WordPress plugin before 6.3.1 does not adequately authorize the user or validate the plugin URL in its functionality for installing add-ons. This allows a user with a role as low as Subscriber to install and activate arbitrary plugins of arbitrary versions from the WordPress.org plugin repository onto the site, leading to Remote Code Execution.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.22452 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Formidable Forms (Unknown): 6.3.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Formidable Forms | before 6.3.1 | 6.3.1 | Patch available | CNA |
- Formidable Forms VendorUnknown Affected before 6.3.1 Fixed in 6.3.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:strategy11:formidable_forms:*:*:*:*:*:wordpress:*:* | before 6.3.1 | Vulnerable | strategy11team |
- cpe:2.3:a:strategy11:formidable_forms:*:*:*:*:*:wordpress:*:* Versions before 6.3.1 Vulnerable ·strategy11team
Remediation
- Fix · CNA Formidable Forms (Unknown) Fixed in 6.3.1
Timeline
- 2026-10-02 Threatist record created from CVE-2023-2877
- 2026-10-03 Alias added: GHSA-2x7r-m54m-f2pf
References
More strategy11team Formidable Forms vulnerabilities
- TI-2023-01329 Formidable Forms < 6.2 - Unauthenticated PHP Object Injection CVSS 3.1HIGH 7.5
- TI-2024-09065 Formidable Forms < 6.14.1 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
- TI-2022-22610 WordPress Formidable Forms plugin <= 5.5.4 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
- TI-2024-15563 WordPress Formidable Forms plugin <= 6.7 - Content Injection vulnerability CVSS 3.1MEDIUM 6.1
- TI-2024-10363 Cross-site scripting in strategy11team Formidable Forms – Contact Form Plugin, Survey… CVSS 3.1MEDIUM 6.1
- TI-2024-00610 Formidable Forms <= 6.7.2 - Cross-Site Request Forgery to Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.1
Sources
- CVE-2023-2877 · CVE Program
- CVE-2023-2877 · NVD
- FIRST EPSS
- GHSA-2x7r-m54m-f2pf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences