Cross-site scripting in Drupal - CVE-2020-13666
Published: September 17, 2020 / Updated: October 1, 2020
Vulnerability identifier: #VU46767
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2020-13666
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit 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 AJAX API, related to JSONP processing. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
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
Drupal
Backdrop CMS
drupal7 (Alpine package)
drupal8
Fedora
Backdrop CMS
drupal7 (Alpine package)
drupal8
Fedora
How to mitigate CVE-2020-13666
Install updates from vendor's website.
Drupal - addressed in versions 7.73, 8.8.10, 8.9.6, 9.0.6
Backdrop CMS - addressed in versions 1.16.4, 1.17.1
drupal7 (Alpine package) - update to 7.73-r0
drupal8 - addressed in versions 8.9.11-1.fc32, 8.9.11-1.fc33
Backdrop CMS - addressed in versions 1.16.4, 1.17.1
drupal7 (Alpine package) - update to 7.73-r0
drupal8 - addressed in versions 8.9.11-1.fc32, 8.9.11-1.fc33