CVE-2026-3466 | Checkmk up to 2.2.0/2.3.0p45/2.4.0p24/2.5.0b2 Dashboard Dashlet Title Link cross site scripting

VDB-355734 · CVE-2026-3466 · GCVE-0-2026-3466 CHECKMK UP TO 2.2.0/2.3.0P45/2.4.0P24/2.5.0B2 DASHBOARD DASHLET TITLE LINK CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.4 $0-$5k 1.33+ Summaryinfo A vulnerability categorized as problematic has been discovered in Checkmk up to 2.2.0/2.3.0p45/2.4.0p24/2.5.0b2. Impacted is an unknown function of the component Dashboard Dashlet Title Link Handler. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-3466. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component. Detailsinfo A vulnerability classified as problematic has been found in Checkmk up to 2.2.0/2.3.0p45/2.4.0p24/2.5.0b2. Affected is an unknown functionality of the component Dashboard Dashlet Title Link Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes: Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard. The advisory is available at checkmk.com. This vulnerability is traded as CVE-2026-3466 since 03/03/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. Upgrading to version 2.3.0p46, 2.4.0p25 or 2.5.0b3 eliminates this vulnerability. Productinfo Name Checkmk Version 2.0 2.1 2.2.0 2.3.0p45 2.4.0p24 2.5.0b2 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 3.5 VulDB Meta Temp Score: 3.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 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: Checkmk 2.3.0p46/2.4.0p25/2.5.0b3 Timelineinfo 03/03/2026 CVE reserved 04/07/2026 +34 days Advisory disclosed 04/07/2026 +0 days VulDB entry created 04/07/2026 +0 days VulDB entry last update Sourcesinfo Advisory: checkmk.com Status: Confirmed CVE: CVE-2026-3466 (🔒) GCVE (CVE): GCVE-0-2026-3466 GCVE (VulDB): GCVE-100-355734 Entryinfo Created: 04/07/2026 15:17 Changes: 04/07/2026 15:17 (66) Complete: 🔍 Cache ID: 99:3C8:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸