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VulnerabilityPublished

CVE-2026-4512: reCaptcha by WebDesignBy (WordPress plugin) · Cross-Site Scripting (XSS)

Affects reCaptcha by WebDesignBy (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 3.5 Low : upgrade to 2.0 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
3.5Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade reCaptcha by WebDesignBy (WordPress plugin) to 2.0.

Affected software

ProductAffectedFixed in
reCaptcha by WebDesignByAffected
  • <2.0
Fixed in
  • 2.0

AI-suggested

If you cannot patch yet, administrators should restrict access to multisite administrative functions and carefully control who can modify plugin settings. Monitoring for plugin updates and applying them promptly when available is recommended.

Description

CVE-2026-4512 is a low-severity cross-site scripting (XSS) vulnerability in the reCaptcha by WebDesignBy WordPress plugin versions before 2.0. The issue arises because the plugin does not properly sanitize or escape the Site Key setting before outputting it in a JavaScript string context via the grecaptcha_js() function. This flaw allows administrators on multisite WordPress installations, who lack the unfiltered_html capability, to inject arbitrary JavaScript that executes for all visitors to the WordPress login page.

References

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