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CVE-2020-5529

22
FAUCET Score

CVE-2020-5529 describes code execution vulnerabilities in HtmlUnit versions prior to 2.37.0, impacting products from Apache, Canonical, and Debian. The vulnerability stems from improper initialization of the Rhino engine, allowing malicious JavaScript to execute arbitrary Java code, including within Android applications. With a CVSS score of 8.1 (High), this vulnerability has a network attack vector, high complexity, and a severe impact on confidentiality, integrity, and availability. There is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.37.0CPE matchmatch criteria
cpe:2.3:a:htmlunit:htmlunit:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:apache:camel:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.72%
Probability of exploitation in next 30 days
EPSS Percentile
90.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0472 is in the 57th percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: net.sourceforge.htmlunit:htmlunitFixed in: 2.37.0

Vendor Advisories (2)

mavenGHSA-5mh9-r3rr-9597high

Code execution vulnerability in HtmlUnit

May 21, 2020
redhatCVE-2020-5529Moderate

htmlunit: malicious JavaScript code leads to arbitrary java code execution

Feb 10, 2020

References

github.com / HtmlUnit/htmlunit/releases/tag/2.37.0
Release NotesThird Party Advisory
jvn.jp / en/jp/JVN34535327
Third Party Advisory
lists.apache.org / thread.html/ra2cd7f8e61dc6b8a2d9065094cd1f46aa63ad10f237ee363e26e8563%40%3Ccommits.camel.apache.org%3E
lists.debian.org / debian-lts-announce/2020/08/msg00023.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 4584-1
Third Party Advisory