CVE-2026-4512 | WebDesignBy reCaptcha Plugin up to 1.x on WordPress Setting grecaptcha_js cross site scripting

VDB-359122 · CVE-2026-4512 · GCVE-0-2026-4512 WEBDESIGNBY RECAPTCHA PLUGIN UP TO 1.X ON WORDPRESS SETTING GRECAPTCHA_JS CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.3 $0-$5k 2.36+ Summaryinfo A vulnerability categorized as problematic has been discovered in WebDesignBy reCaptcha Plugin up to 1.x on WordPress. Impacted is the function grecaptcha_js of the component Setting Handler. Executing a manipulation can lead to cross site scripting. This vulnerability is tracked as CVE-2026-4512. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability has been found in WebDesignBy reCaptcha Plugin up to 1.x on WordPress and classified as problematic. This vulnerability affects the function grecaptcha_js of the component Setting Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes: 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. The weakness was disclosed by Mustafa Ahmed. The advisory is available at wpscan.com. This vulnerability was named CVE-2026-4512 since 03/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. Upgrading to version 2.0 eliminates this vulnerability. Productinfo Type WordPress Plugin Vendor WebDesignBy Name reCaptcha Plugin Version 1.x CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 2.4 VulDB Meta Temp Score: 2.3 VulDB Base Score: 2.4 VulDB Temp Score: 2.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: reCaptcha Plugin 2.0 Timelineinfo 03/20/2026 CVE reserved 04/23/2026 +33 days Advisory disclosed 04/23/2026 +0 days VulDB entry created 04/23/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wpscan.com Researcher: Mustafa Ahmed Status: Confirmed CVE: CVE-2026-4512 (🔒) GCVE (CVE): GCVE-0-2026-4512 GCVE (VulDB): GCVE-100-359122 Entryinfo Created: 04/23/2026 08:54 Changes: 04/23/2026 08:54 (59) Complete: 🔍 Cache ID: 99:9C2:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸