Stored cross-site scripting in Moodle - CVE-2019-3847
Published: March 19, 2019
Vulnerability identifier: #VU18018
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2019-3847
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in user's Dashboard. A remote authenticated attacker can permanently inject JavaScript into Dashboard and execute it victim's browser in context of vulnerable website, when a privileged user with "login as other users" capability view compromised Dashboard on attackers behalf.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Moodle
How to mitigate CVE-2019-3847
Install updates from vendor's website.
Moodle - addressed in versions 3.1.17, 3.4.8, 3.5.5, 3.6.3