THREATOPS

THREAT OPS › Threat News › [NVD] CVE-2026-39878 (CRITICAL 9.3) — Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeov

[NVD] CVE-2026-39878 (CRITICAL 9.3) — Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeov

lownvdPublished 2026-07-20

CVE-2026-39878 CVSS: 9.3 CRITICAL Published: 2026-07-20T18:16:51.713

Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40.

MITRE ATT&CK techniques

JavaScriptT1059.007

Indicators of compromise

CVE-2026-39878cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-39878