What is CVE-2021-31347?

CVE-2021-31347 is a medium-severity vulnerability in Ezxml Project, classified under XML Injection (Blind XPath Injection). CVSS score: 6.5/10. Published 2021-04-16.

How severe is CVE-2021-31347?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XPath Injection in Ezxml Project

CVE-2021-31347

An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_parse_str() performs incorrect memory handling while parsing crafted XML files (writing outside a memory region created by mmap).

Published 2021-04-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Ezxml Project — versions 0.8.6
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-91 — XML Injection (Blind XPath Injection)

References

sourceforge.net/p/ezxml/bugs/27/ (Exploit, Patch, Third Party Advisory, Issue Tracking)
lists.debian.org/debian-lts-announce/2021/07/msg00005.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-31347?: CVE-2021-31347 is a medium-severity vulnerability in Ezxml Project, classified under XML Injection (Blind XPath Injection). CVSS score: 6.5/10. Published 2021-04-16.
How severe is CVE-2021-31347?: Medium severity. CVSS v3 base score is 6.5 out of 10.