How severe is CVE-2021-31229?

CVE-2021-31229 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-31229 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31229?

CVE-2021-31229 primarily affects Ezxml Project Ezxml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31229?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31229 published?

CVE-2021-31229 was published on 2021-04-15 and last updated on 2026-06-17.

CVE-2021-31229

CVE-2021-31229 is a medium-severity vulnerability in Ezxml Project Ezxml with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ezxml Project Ezxml
Published: 2021-04-15
Last modified: 2026-06-17

Description

An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_internal_dtd() performs incorrect memory handling while parsing crafted XML files, which leads to an out-of-bounds write of a one byte constant.

Frequently asked questions

What is CVE-2021-31229?: An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_internal_dtd() performs incorrect memory handling while parsing crafted XML files, which leads to an out-of-bounds write of a one byte constant.
How severe is CVE-2021-31229?: CVE-2021-31229 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-31229 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31229?: CVE-2021-31229 primarily affects Ezxml Project Ezxml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31229?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31229 published?: CVE-2021-31229 was published on 2021-04-15 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ezxml_project:ezxml:0.8.6:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

More vulnerabilities in Ezxml Project Ezxml

CVE-2021-26222 — High (CVSS 8.1): The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting the…
CVE-2021-26221 — High (CVSS 8.1): The ezxml_new function in ezXML 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting the…
CVE-2021-26220 — High (CVSS 8.1): The ezxml_toxml function in ezxml 0.8.6 and earlier is vulnerable to OOB write when opening XML file after exhausting…
CVE-2021-31598 — High (CVSS 7.5): An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_decode() performs incorrect memory handling…
CVE-2019-20006 — High (CVSS 7.5): An issue was discovered in ezXML 0.8.3 through 0.8.6. The function ezxml_char_content puts a pointer to the internal…
CVE-2022-30045 — Medium (CVSS 6.5): An issue was discovered in libezxml.a in ezXML 0.8.6. The function ezxml_decode() performs incorrect memory handling…

All CVEs affecting Ezxml Project Ezxml →

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