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Linux Distros Unpatched Vulnerability : CVE-2025-69534

high Nessus Plugin ID 301189

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python- Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions. (CVE-2025-69534)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-69534

https://security-tracker.debian.org/tracker/CVE-2025-69534

Plugin Details

Severity: High

ID: 301189

File Name: unpatched_CVE_2025_69534.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 3/6/2026

Updated: 3/7/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2025-69534

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:pypy3, p-cpe:/a:debian:debian_linux:python2.7, p-cpe:/a:debian:debian_linux:python3.9, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:python-markdown, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:centos:centos:python3-markdown, p-cpe:/a:redhat:enterprise_linux:python3-markdown, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:python-markdown, cpe:/o:debian:debian_linux:14.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:python3.11

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/5/2026

Reference Information

CVE: CVE-2025-69534