CVE-2021-42860

Name: CVE-2021-42860
Creator: NVD / NIST
Published: 2022-05-26T12:15:07.693+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2021-42860 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A stack buffer overflow exists in Mini-XML v3.2. When inputting an unformed XML string to the mxmlLoadString API, it will cause a stack-buffer-overflow in mxml_string_getc:2611. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

A stack buffer overflow exists in Mini-XML v3.2. When inputting an unformed XML string to the mxmlLoadString API, it will cause a stack-buffer-overflow in mxml_string_getc:2611. NOTE: it is unclear whether this input is allowed by the API specification

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.97%

57.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-772

Affected Software

Vendor	Product	Versions
Mini-Xml Project	Mini-Xml	3.2

References

https://github.com/michaelrsweet/mxml/issues/286Exploit, Issue Tracking, Third Party Advisory
https://github.com/michaelrsweet/mxml/issues/286Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: May 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42860?

How severe is CVE-2021-42860?

CVE-2021-42860 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42860?

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-2021-42860?

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

Scan your code now

Source: NVD / NIST