What is CVE-2021-42860?

CVE-2021-42860 is a high-severity vulnerability in Mini-Xml Project, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2022-05-26.

How severe is CVE-2021-42860?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mini-Xml Project

CVE-2021-42860

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

Published 2022-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Mini-Xml Project — versions 3.2

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

github.com/michaelrsweet/mxml/issues/286 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-42860?: CVE-2021-42860 is a high-severity vulnerability in Mini-Xml Project, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 7.5/10. Published 2022-05-26.
How severe is CVE-2021-42860?: High severity. CVSS v3 base score is 7.5 out of 10.