Cross-site scripting in Backdrop CMS - CVE-2019-14769
Published: August 8, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU30828
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2019-14769
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Backdrop CMS
Affected software:
Backdrop CMS
Backdrop CMS
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Backdrop CMS 1.12.x before 1.12.8 and 1.13.x before 1.13.3 doesn't sufficiently filter output when displaying certain block labels created by administrators. An attacker could potentially craft a specialized label, then have an administrator execute scripting when administering a layout. (This issue is mitigated by the attacker needing permission to create custom blocks on the site, which is typically an administrative permission.)
How to mitigate CVE-2019-14769
Install update from vendor's website.