PT-2020-12921 · Python+1 · Python-Markdown2+1

Thegrandpew · Published 2020-04-20 · Updated 2020-05-25 · CVE-2020-11888

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions python-markdown2 versions 2.3.8 and earlier

Description The issue arises from the mishandling of element names, which can lead to XSS attacks unless a w+ match succeeds. An example of a potential attack involves using element names with special characters, such as elementname@ or elementname-, in combination with an onclick attribute.

Recommendations For python-markdown2 versions 2.3.8 and earlier, update to a version that properly handles element names to prevent XSS attacks.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-11888

GHSA-FV3H-8X5J-PVGQ

OPENSUSE-SU-2020:0651-1

OPENSUSE-SU-2020:0656-1

OPENSUSE-SU-2020_0651-1

PYSEC-2020-65

Affected Products

Suse

Python-Markdown2

References · 27

• 🔥 https://github.com/trentm/python-markdown2/issues/348 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-11888 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2020:0656-1 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00031.html · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/6XOAIRJJCZNJUALXDHSIGH5PS2H63A3J · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/PN6QSHRFZXRQAYZJQ4MOW5MKIXBYOMED · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-11888 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN6QSHRFZXRQAYZJQ4MOW5MKIXBYOMED · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/AQLRBGRVRRZK7P5SFL2MNGXFX37YHJAV · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-11888 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00035.html · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQLRBGRVRRZK7P5SFL2MNGXFX37YHJAV · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-11888 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-11888 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-fv3h-8x5j-pvgq · Vendor Advisory