Cross-site scripting in python-markdown2 - CVE-2020-11888
Published: April 27, 2020 / Updated: February 13, 2023
Vulnerability identifier: #VU27349
CSH Severity: Low
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-2020-11888
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 the element names are mishandled unless a \w+ match succeeds. 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
python-markdown2
Fedora
SUSE Linux
Opensuse
python-markdown2
Fedora
SUSE Linux
Opensuse
python-markdown2
How to mitigate CVE-2020-11888
Install update from vendor's website.
python-markdown2 - update to 2.3.9
python-markdown2 - addressed in versions 2.3.9-1.el8, 2.3.9-1.fc30, 2.3.9-1.fc31, 2.3.9-1.fc32
python-markdown2 - addressed in versions 2.3.9-1.el8, 2.3.9-1.fc30, 2.3.9-1.fc31, 2.3.9-1.fc32