PT-2026-33216 · Kimai · Kimai

Kevinpapst · Published 2026-04-15 · Updated 2026-04-27 · CVE-2026-40479

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Kimai (affected versions not specified)

Description An incomplete security patch in the client-side escapeForHtml() function within KimaiEscape.js allows for Stored Cross-Site Scripting (XSS). The function fails to escape double quotes (") and single quotes ('), which are essential for preventing injection in HTML attribute contexts. When user-controlled data, such as a profile alias, is placed in an HTML attribute like 'title=" DISPLAY "' and rendered using innerHTML, an attacker can perform HTML attribute injection. This can lead to privilege escalation, where a user with ROLE USER permissions executes scripts in the browser session of a user with ROLE ADMIN or ROLE SUPER ADMIN permissions.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-40479

GHSA-G82G-M9VX-VHJG

Affected Products

Kimai

References · 10

• https://github.com/kimai/kimai/security/advisories/GHSA-g82g-m9vx-vhjg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40479 · Security Note
• https://osv.dev/vulnerability/GHSA-g82g-m9vx-vhjg · Vendor Advisory
• https://github.com/kimai/kimai · Note
• https://github.com/kimai/kimai/releases/tag/2.53.0 · Note
• https://github.com/kimai/kimai/pull/2959 · Note
• https://twitter.com/VulmonFeeds/status/2045365559554949447 · Twitter Post
• https://twitter.com/CVEnew/status/2045467371519754298 · Twitter Post
• https://twitter.com/dailycve/status/2044579911503868169 · Twitter Post
• https://t.me/cveNotify/161147 · Telegram Post