CVE-2026-40479 | Kimai up to 2.52.x KimaiEscape.js escapeForHtml cross site scripting (GHSA-g82g-m9vx-vhjg)

VDB-358182 · CVE-2026-40479 · GHSA-G82G-M9VX-VHJG KIMAI UP TO 2.52.X KIMAIESCAPE.JS ESCAPEFORHTML CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 0.76+ Summaryinfo A vulnerability was found in Kimai up to 2.52.x. It has been declared as problematic. Affected by this vulnerability is the function escapeForHtml of the file KimaiEscape.js. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-40479. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability classified as problematic has been found in Kimai up to 2.52.x. Affected is the function escapeForHtml of the file KimaiEscape.js. 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: Kimai is an open-source time tracking application. In versions 1.16.3 through 2.52.0, the escapeForHtml() function in KimaiEscape.js does not escape double quote or single quote characters. When a user's profile alias is inserted into an HTML attribute context via the team member form prototype and rendered through innerHTML, this incomplete escaping allows HTML attribute injection. An authenticated user with ROLE_USER privileges can store a malicious alias that executes JavaScript in the browser of any administrator viewing the team form, resulting in stored XSS with privilege escalation. This issue has been fixed in version 2.53.0. The advisory is available at github.com. This vulnerability is traded as CVE-2026-40479 since 04/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 2.53.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Name Kimai Version 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.39 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 2.51 2.52 Website Product: https://github.com/kimai/kimai/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.4 VulDB Meta Temp Score: 4.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.4 CNA Vector (GitHub_M): 🔒 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: Kimai 2.53.0 Timelineinfo 04/13/2026 CVE reserved 04/18/2026 +5 days Advisory disclosed 04/18/2026 +0 days VulDB entry created 04/18/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-g82g-m9vx-vhjg Status: Confirmed CVE: CVE-2026-40479 (🔒) GCVE (CVE): GCVE-0-2026-40479 GCVE (VulDB): GCVE-100-358182 Entryinfo Created: 04/18/2026 09:24 Changes: 04/18/2026 09:24 (66) Complete: 🔍 Cache ID: 99:A41:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸