CVE-2026-1890 | LeadConnector Plugin up to 3.0.21 on WordPress authorization

VDB-353566 · CVE-2026-1890 · GCVE-0-2026-1890 LEADCONNECTOR PLUGIN UP TO 3.0.21 ON WORDPRESS AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 2.25+ Summaryinfo A vulnerability labeled as critical has been found in LeadConnector Plugin up to 3.0.21 on WordPress. This issue affects some unknown processing. Executing a manipulation can lead to authorization. This vulnerability is handled as CVE-2026-1890. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded. Detailsinfo A vulnerability classified as critical was found in LeadConnector Plugin up to 3.0.21 on WordPress. This vulnerability affects an unknown part. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: The LeadConnector WordPress plugin before 3.0.22 does not have authorization in a REST route, allowing unauthenticated users to call it and overwrite existing data The weakness was released by Yiğit Ibrahim Sağlam. The advisory is available at wpscan.com. This vulnerability was named CVE-2026-1890 since 02/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. Upgrading to version 3.0.22 eliminates this vulnerability. Productinfo Type WordPress Plugin Name LeadConnector Plugin Version 3.0.0 3.0.1 3.0.2 3.0.3 3.0.4 3.0.5 3.0.6 3.0.7 3.0.8 3.0.9 3.0.10 3.0.11 3.0.12 3.0.13 3.0.14 3.0.15 3.0.16 3.0.17 3.0.18 3.0.19 3.0.20 3.0.21 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 7.0 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 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-862 / CWE-863 / CWE-285 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: LeadConnector Plugin 3.0.22 Timelineinfo 02/04/2026 CVE reserved 03/26/2026 +50 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wpscan.com Researcher: Yiğit Ibrahim Sağlam Status: Confirmed CVE: CVE-2026-1890 (🔒) GCVE (CVE): GCVE-0-2026-1890 GCVE (VulDB): GCVE-100-353566 Entryinfo Created: 03/26/2026 07:46 Changes: 03/26/2026 07:46 (55) Complete: 🔍 Cache ID: 99:6C4:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸