WP reCaptcha by WebDesignBy < 2.0 – Admin+ Stored XSS
Priority MEDIUM 50CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The reCaptcha by WebDesignBy WordPress plugin before 2.0 does not sanitize or escape the Site Key setting before outputting it in a JavaScript string context via the grecaptcha_js() function. This allows administrators on multisite installations (who do not have the unfiltered_html capability) to inject arbitrary JavaScript that executes for all visitors to the WordPress login page.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed reCaptcha by WebDesignBy (Unknown): 2.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 | reCaptcha by WebDesignBy | before 2.0 | 2.0 | Patch available | CNA |
- reCaptcha by WebDesignBy VendorUnknown Affected before 2.0 Fixed in 2.0 Patch available CNA
Remediation
- Fix · CNA reCaptcha by WebDesignBy (Unknown) Fixed in 2.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4512
- 2026-10-03 Alias added: GHSA-gq9g-w427-pc6x
References
Sources
- CVE-2026-4512 · CVE Program
- CVE-2026-4512 · NVD
- FIRST EPSS
- GHSA-gq9g-w427-pc6x · 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