CVE-2022-23850: xhtml_translate_entity in xhtml.c in epub2txt (aka epub2txt2) through 2.02 allows a stack-based buffer overflo

Q: How do I fix CVE-2022-23850?

epub2txt: upgrade to newer than 2.02. Exact commands for each OS are on this page.

Q: Is CVE-2022-23850 being exploited?

CVE-2022-23850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-23850 affect?

CVE-2022-23850 affects epub2txt. Severity is high (CVSS 7.8). xhtml_translate_entity in xhtml.c in epub2txt (aka epub2txt2) through 2.02 allows a stack-based buffer overflow via a crafted EPUB document.

Q: How urgent is CVE-2022-23850?

Priority 47/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2022-23850 is a high-severity flaw (CVSS 7.8) affecting epub2txt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

xhtml_translate_entity in xhtml.c in epub2txt (aka epub2txt2) through 2.02 allows a stack-based buffer overflow via a crafted EPUB document.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-01-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: epub2txt project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-23 07:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

epub2txt project epub2txt UPGRADE

Affected: <= 2.02

Fixed in: newer than 2.02

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy epub2txt || rpm -q epub2txt || epub2txt --version

2. UPGRADE to newer than 2.02 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade epub2txt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade epub2txt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-23850?

epub2txt: upgrade to newer than 2.02. Exact commands for each OS are on this page.

Is CVE-2022-23850 being exploited?

CVE-2022-23850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-23850 affect?

CVE-2022-23850 affects epub2txt. Severity is high (CVSS 7.8). xhtml_translate_entity in xhtml.c in epub2txt (aka epub2txt2) through 2.02 allows a stack-based buffer overflow via a crafted EPUB document.

How urgent is CVE-2022-23850?

Priority 47/100. High severity; Public exploit reference

References

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