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HIGH severity

CVE-2021-37714 — jsoup

HIGH

CVE-2021-37714 is a high-severity (CVSS 7.5) CWE-248 vulnerability in org.jsoup:jsoup. A fix is available for org.jsoup:jsoup — see the affected versions and patch details below.

Uncaught Exception in jsoup

Also known asGHSA-m72m-mhq2-9p6c
Published
Aug 18, 2021
Updated
Jul 8, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Sep 19, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
6.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

CVE-2021-37714 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.

Where this sits among everything scored

Of 376,715 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

Real-World Exposure

1 pkg affected
☕org.jsoup:jsoup

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

jsoup is a Java library for working with HTML. Those using jsoup versions prior to 1.14.2 to parse untrusted HTML or XML may be vulnerable to DOS attacks. If the parser is run on user supplied input, an attacker may supply content that causes the parser to get stuck (loop indefinitely until cancelled), to complete more slowly than usual, or to throw an unexpected exception. This effect may support a denial of service attack. The issue is patched in version 1.14.2. There are a few available workarounds. Users may rate limit input parsing, limit the size of inputs based on system resources, and/or implement thread watchdogs to cap and timeout parse runtimes.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jsoup:jsoupall versions1.14.2org.jsoup:jsoup:1.14.2

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jsoup:jsoup, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jsoup:jsoup to 1.14.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-37714 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2021-37714 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2021-37714. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
ProductFixed inAdvisory
EAP 7.3.10 GAjsoupRHSA-2021:5154
Red Hat build of Quarkus 2.2.5jsoupRHSA-2022:0589
Red Hat EAP-XP 2 via EAP 7.3.x basejsoupRHSA-2022:0146
Red Hat Fuse 7.10jsoupRHSA-2021:5134
Red Hat JBoss Enterprise Application Platformorg.jsoup/jsoup:1.14.2.redhat-00002RHSA-2021:4679
Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7eap7-activemq-artemis-0:1.5.5.016-1.redhat_00001.1.ep7.el7RHSA-2025:4226
Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eapRHSA-2021:5149
Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el7eapRHSA-2021:5150

Frequently Asked Questions

jsoup is a Java library for working with HTML. Those using jsoup versions prior to 1.14.2 to parse untrusted HTML or XML may be vulnerable to DOS attacks. If the parser is run on user supplied input, an attacker may supply content that causes the parser to get stuck (loop indefinitely until cancelled), to complete more slowly than usual, or to throw an unexpected exception. This effect may support a denial of service attack. The issue is patched in version 1.14.2. There are a few available workarounds. Users may rate limit input parsing, limit the size of inputs based on system resources, and/
O3 Security · Impact-Aware SCA

Is CVE-2021-37714 in your dependencies?

O3 Security finds CVE-2021-37714 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works
CVE-2021-37714: jsoup DoS (High 7.5) | O3 Security