CVE-2026-40784 | Mahmudul Hasan Arif FluentBoards Plugin up to 1.91.2 on WordPress authorization

VDB-357709 · CVE-2026-40784 · GCVE-0-2026-40784 MAHMUDUL HASAN ARIF FLUENTBOARDS PLUGIN UP TO 1.91.2 ON WORDPRESS AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.1 $0-$5k 2.40 Summaryinfo A vulnerability identified as critical has been detected in Mahmudul Hasan Arif FluentBoards Plugin up to 1.91.2 on WordPress. Affected by this vulnerability is an unknown functionality. This manipulation causes authorization. The identification of this vulnerability is CVE-2026-40784. It is possible to initiate the attack remotely. There is no exploit available. Detailsinfo A vulnerability has been found in Mahmudul Hasan Arif FluentBoards Plugin up to 1.91.2 on WordPress and classified as critical. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: Authorization Bypass Through User-Controlled Key vulnerability in Mahmudul Hasan Arif FluentBoards fluent-boards allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects FluentBoards: from n/a through <= 1.91.2. The weakness was shared by Jakub Herman. The advisory is shared at patchstack.com. This vulnerability is known as CVE-2026-40784 since 04/15/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/15/2026). 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 Mahmudul Hasan Arif Name FluentBoards Plugin Version 1.91.0 1.91.1 1.91.2 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.1 VulDB Base Score: 6.3 VulDB Temp Score: 6.1 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: Authorization CWE: CWE-639 / CWE-285 / CWE-266 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 04/15/2026 Advisory disclosed 04/15/2026 +0 days CVE reserved 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Advisory: patchstack.com Researcher: Jakub Herman Status: Not defined CVE: CVE-2026-40784 (🔒) GCVE (CVE): GCVE-0-2026-40784 GCVE (VulDB): GCVE-100-357709 Entryinfo Created: 04/15/2026 14:02 Changes: 04/15/2026 14:02 (54) Complete: 🔍 Cache ID: 99:BF9:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸