htmlcleaner vulnerable to stack exhaustion

published 2023-06-14 3 y ago modified 2026-06-17 4 mo ago also GHSA-jv4x-j47q-6qvp , EUVD-2023-1838

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

An issue was discovered htmlcleaner thru = 2.28 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.

Patch / fix

fixed in 1 distros 2

maven net.sourceforge.htmlcleaner:htmlcleaner 2.29

debian ubuntu

libhtmlcleaner-java Debian 12 2.26-1+deb12u1
libhtmlcleaner-java Debian 14, Debian 13 2.29-1

debian advisories DEBIAN-CVE-2023-34624

libhtmlcleaner-java Ubuntu 22.04 LTS 2.24-1+deb11u1build0.22.04.1
libhtmlcleaner-java Ubuntu Pro 18.04 LTS 2.21-2ubuntu0.1~esm1
libhtmlcleaner-java Ubuntu Pro 20.04 LTS 2.23-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2023-34624

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2025-01-06)

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/amplafi/htmlcleaner/issues/13 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	net.sourceforge.htmlcleaner:htmlcleaner	<2.29	2.29

Classification

Weakness

CWE-787 Out-of-bounds Write
CWE-400 Uncontrolled Resource Consumption

References

github.com /amplafi/htmlcleaner/issues/13
web, exploit, issue-tracking, third-party-advisory
debian.org /security/2023/dsa-5471
vendor-advisory, web
lists.debian.org /debian-lts-announce/2023/08/msg00007.html
mailing-list, web
nvd.nist.gov /vuln/detail/CVE-2023-34624
advisory
github.com /amplafi/htmlcleaner
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary