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CVE-2026-4512 - Before 2 Plugin

CVE-2026-4512

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.

CVE-2026-4512

LOW CVSS 3.5 Published 2026-04-23 Updated 2026-04-23
AI Risk Low (30/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P5 Monitor
Severity Band LOW
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
Affected Components 2
Reference Links 1
AI Risk Engine Low (30/100)
Exploitability Low
Active Exploitation No strong signal
Published Exploit Status No public exploit references

Threat Timeline

  1. 2026-04-23 CVE published and first recorded in the threat feed.
  2. 2026-04-23 Record updated with latest vulnerability metadata.
  3. 2026-04-23 AI technical context refreshed for mitigation and impact guidance.
  4. Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 5 days ago

AI enriched 5 days ago (2026-04-23 18:25 UTC)

Technical 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.

Potential Impact

Severity is LOW (CVSS 3.5). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as Low based on severity and technical exposure profile.

Primary risk drivers: severity and technical exposure profile

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

AI risk score 30/100 (Low, Low) with priority P5 Monitor. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Before 2 PLUGIN · before-2 Affected: < 2.0 Fixed in: 2.0
Recaptcha By Webdesignby PLUGIN · recaptcha-by-webdesignby Affected: < 2.0 Fixed in: 2.0
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