CVE-2026-3995 | faridsaniee OPEN-BRAIN Plugin up to 0.5.0 on WordPress Setting sanitize_text_field API key cross site scripting

VDB-357904 · CVE-2026-3995 · GCVE-0-2026-3995 FARIDSANIEE OPEN-BRAIN PLUGIN UP TO 0.5.0 ON WORDPRESS SETTING SANITIZE_TEXT_FIELD API KEY CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.4 $0-$5k 0.53+ Summaryinfo A vulnerability categorized as problematic has been discovered in faridsaniee OPEN-BRAIN Plugin up to 0.5.0 on WordPress. This affects the function sanitize_text_field of the component Setting Handler. Executing a manipulation of the argument API key can lead to cross site scripting. The identification of this vulnerability is CVE-2026-3995. The attack may be launched remotely. There is no exploit available. Detailsinfo A vulnerability classified as problematic was found in faridsaniee OPEN-BRAIN Plugin up to 0.5.0 on WordPress. This vulnerability affects the function sanitize_text_field of the component Setting Handler. The manipulation of the argument API key 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 OPEN-BRAIN plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'API Key' settings field in all versions up to, and including, 0.5.0. This is due to insufficient input sanitization and output escaping. The plugin uses sanitize_text_field() which strips HTML tags but does not encode double quotes or other HTML-special characters needed for safe attribute context output. The API key value is saved via update_option() and later output into an HTML input element's value attribute without esc_attr() escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts via attribute breakout payloads (e.g., double quotes followed by event handlers) that execute whenever a user accesses the plugin settings page. The weakness was shared by Muhammad Nur Ibnu Hubab. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-3995 since 03/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type WordPress Plugin Vendor faridsaniee Name OPEN-BRAIN Plugin Version 0.1 0.2 0.3 0.4 0.5.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 3.4 VulDB Meta Temp Score: 3.4 VulDB Base Score: 2.4 VulDB Temp Score: 2.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.4 CNA Vector (Wordfence): 🔒 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: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/11/2026 CVE reserved 04/16/2026 +35 days Advisory disclosed 04/16/2026 +0 days VulDB entry created 04/16/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Muhammad Nur Ibnu Hubab Status: Not defined CVE: CVE-2026-3995 (🔒) GCVE (CVE): GCVE-0-2026-3995 GCVE (VulDB): GCVE-100-357904 Entryinfo Created: 04/16/2026 09:20 Changes: 04/16/2026 09:20 (67) Complete: 🔍 Cache ID: 99:37D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸