by Kastro
Paper/Archive/CVE-2026-67595

CVE-2026-67595

webreinvent vaahcms — VaahCMS 2.0.0 - 2.3.4 Malicious JavaScript Supply Chain via security-otp.blade.php

EPSS 0.8%CVSS 9.2
critical.is priorityof 100
39
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 55.4.554 × 2011.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

VaahCMS versions 2.0.0 through 2.3.4 contain a malicious obfuscated JavaScript payload embedded in the Blade template responsible for rendering security OTP emails, allowing remote attackers to execute unauthorized code in any browser that renders the affected email template with JavaScript enabled. The payload establishes a WebSocket connection to a hardcoded command-and-control endpoint, installs a password-field keylogger using MutationObserver to capture dynamically added inputs, scrapes WhatsApp Web DOM content, and accepts remote commands to redirect or overwrite the rendered page.

Affected

ProductAffectedFixed inSource
vaahcms2.0.0 – 2.3.4–CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/webreinvent/vaahcms/pull/317patchgithub.com/webreinvent/vaahcms/commit/8d7898f7a385a5fade1180a9b664ff158d873129writeupvulncheck.com/advisories/vaahcms-malicious-javascript-supply-chain-via-security-otp-blade-php