CVE-2025-59940 — mkdocs-include-markdown-p…
MEDIUMFix: mondeja/mkdocs-include-markdown-plugin@7466d67CVE-2025-59940 is a medium-severity (CVSS 6.5) Improper Input Validation vulnerability in mkdocs-include-markdown-plugin. A fix is available for mkdocs-include-markdown-plugin — see the affected versions and patch details below.
mkdocs-include-markdown-plugin susceptible to unvalidated input colliding with substitution placeholders
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-59940.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
mkdocs-include-markdown-pluginReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
mkdocs-include-markdown-plugin is an Mkdocs Markdown includer plugin. In versions 7.1.7 and below, there is a vulnerability where unvalidated input can collide with substitution placeholders. This issue is fixed in version 7.1.8.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | mkdocs-include-markdown-plugin | all versions | 7.1.8pip install --upgrade 'mkdocs-include-markdown-plugin==7.1.8' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mkdocs-include-markdown-plugin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mkdocs-include-markdown-plugin to 7.1.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-59940 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for CVE-2025-59940 (CC BY 4.0)
Frequently Asked Questions
Is CVE-2025-59940 in your dependencies?
Find it across PyPI, including transitive dependencies.