CVE-2017-16876

Name: CVE-2017-16876
Creator: NVD / NIST
Published: 2017-12-29T15:29:00.61+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.20%

Last modified Jun 17, 2026

CVE-2017-16876 is a vulnerability of currently unknown severity. Cross-site scripting (XSS) vulnerability in the _keyify function in mistune.py in Mistune before 0.8.1 allows remote attackers to inject arbitrary web script or HTML by leveraging failure to escape the "key" argument.. EPSS estimates a 2.20% chance of exploitation in the next 30 days.

Description

Cross-site scripting (XSS) vulnerability in the _keyify function in mistune.py in Mistune before 0.8.1 allows remote attackers to inject arbitrary web script or HTML by leveraging failure to escape the "key" argument.

Metrics

EPSS Probability

2.20%

80.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mistune Project	Mistune	< 0.8.1
Fedoraproject	Fedora	26

References

https://bugzilla.redhat.com/show_bug.cgi?id=1524596Issue Tracking, Third Party Advisory, VDB Entry
https://github.com/lepture/mistune/blob/master/CHANGES.rstRelease Notes, Third Party Advisory
https://github.com/lepture/mistune/commit/5f06d724bc05580e7f203db2d4a4905fc1127f98Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUR3GMHQBMA3UC4PFMCK6GCLOQC4LQQC/
https://bugzilla.redhat.com/show_bug.cgi?id=1524596Issue Tracking, Third Party Advisory, VDB Entry
https://github.com/lepture/mistune/blob/master/CHANGES.rstRelease Notes, Third Party Advisory
https://github.com/lepture/mistune/commit/5f06d724bc05580e7f203db2d4a4905fc1127f98Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUR3GMHQBMA3UC4PFMCK6GCLOQC4LQQC/

Timeline

Published: Dec 29, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-16876?

How severe is CVE-2017-16876?

Severity scoring for CVE-2017-16876 is pending analysis. The EPSS model estimates a 2.20% probability of exploitation in the next 30 days.

How do I fix CVE-2017-16876?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-16876?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST