VulnerabilityAnalyzed

CVE-2025-68142

In systems that take unchecked user content, this could cause long hanges when processing the data if a malicious payload was crafted.

LOW 2.7EPSS 0.48%

Does this matter?

Lower severity and a low EPSS score (0.48%). Track it; it rarely justifies an emergency change on its own.

Description

PyMdown Extensions is a set of extensions for the `Python-Markdown` markdown project. Versions prior to 10.16.1 have a ReDOS bug found within the figure caption extension (`pymdownx.blocks.caption`). In systems that take unchecked user content, this could cause long hanges when processing the data if a malicious payload was crafted. This issue is patched in Release 10.16.1. As a workaround, those who process unknown user content without timeouts or other safeguards in place to prevent really large, malicious content being aimed at systems may avoid the use of `pymdownx.blocks.caption` until they're able to upgrade.

CVSS 4.0: 2.7 LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.48% probability · 40th percentile
CISA KEV: Not listed
Weakness: CWE-1333
Affected: facelessuser/pymdown extensions
Source: security-advisories@github.com

References

https://github.com/facelessuser/pymdown-extensions/commit/b50d15a56850ed1408a284bba81cc019c6bd72e8Patch
https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-r6h4-mm7h-8pmqExploit, Patch, Vendor Advisory
https://pypi.org/project/pymdown-extensions/10.16.1Product, Release Notes

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.