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NVD / CVE Program· CNA mitre

CVE-2021-33813: An XXE issue in SAXBuilder in JDOM through 2.0.6 allows attackers to cause a denial of service via a crafted HTTP request.

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 19.4% (FIRST EPSS); higher than 97.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: libjdom1-java (Debian:12) 1.1.3-2.1; libjdom2-java (Debian:12) 2.0.6-2.1; libjdom1-java (Debian:9) 1.1.3-1+deb9u1.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to libjdom1-java (Debian:12) 1.1.3-2.1; libjdom2-java (Debian:12) 2.0.6-2.1; libjdom1-java (Debian:9) 1.1.3-1+deb9u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published
Jun 16, 2021
Updated
Jun 16, 2026
EPSS
19.4% · 97th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 19.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-33813

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
jdomjdom
apachesolr
apachetika
debiandebian linux
fedoraprojectfedora
oraclecommunications messaging server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache solr8.8.1
  • apache solr8.9
  • apache tika1.25
  • debian debian linux9.0
  • fedoraproject fedora35
  • jdom jdomup to 2.0.6 inclusive
  • oracle communications messaging server8.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libjdom1-javabefore 1.1.3-2.11.1.3-2.1
Debian:12libjdom2-intellij-javafrom 0—
Debian:12libjdom2-javabefore 2.0.6-2.12.0.6-2.1
Debian:9libjdom1-javabefore 1.1.3-1+deb9u11.1.3-1+deb9u1
Debian:9libjdom2-javabefore 2.0.6-1+deb9u12.0.6-1+deb9u1
Mavenorg.jdom:jdomup to and including 2.0.2—
Mavenorg.jdom:jdom2before 2.0.6.12.0.6.1
openSUSE:Leap 15.2jdom2before 2.0.6-lp152.2.3.12.0.6-lp152.2.3.1
openSUSE:Leap 15.3jdom2before 2.0.6-3.3.12.0.6-3.3.1
openSUSE:Leap 15.5apiguardianbefore 1.1.2-150200.3.10.21.1.2-150200.3.10.2
openSUSE:Leap 15.5assertj-corebefore 3.25.3-150200.5.4.33.25.3-150200.5.4.3
openSUSE:Leap 15.5byte-buddybefore 1.14.16-150200.5.7.11.14.16-150200.5.7.1
openSUSE:Leap 15.5dom4jbefore 2.1.4-150200.12.10.22.1.4-150200.12.10.2
openSUSE:Leap 15.5hamcrestbefore 2.2-150200.12.17.22.2-150200.12.17.2
openSUSE:Leap 15.5jaxenbefore 2.0.0-150200.5.3.12.0.0-150200.5.3.1
openSUSE:Leap 15.5jdombefore 1.1.3-150200.12.8.21.1.3-150200.12.8.2
openSUSE:Leap 15.5jopt-simplebefore 5.0.4-150200.3.4.35.0.4-150200.3.4.3
openSUSE:Leap 15.5junitbefore 4.13.2-150200.3.15.24.13.2-150200.3.15.2
openSUSE:Leap 15.5junit5before 5.10.2-150200.3.10.35.10.2-150200.3.10.3
openSUSE:Leap 15.5junit5-minimalbefore 5.10.2-150200.3.10.25.10.2-150200.3.10.2
openSUSE:Leap 15.5objectweb-asmbefore 9.7-150200.3.15.29.7-150200.3.15.2
openSUSE:Leap 15.5open-test-reportingbefore 0.1.0~M2-150200.5.7.20.1.0~M2-150200.5.7.2
openSUSE:Leap 15.5saxpathbefore 1.0-150200.5.3.31.0-150200.5.3.3
openSUSE:Leap 15.5xombefore 1.3.9-150200.5.3.31.3.9-150200.5.3.3

+19

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:libjdom1-java1.1.3-2.1 · Debian:12Package registry (OSV)
debian:libjdom2-java2.0.6-2.1 · Debian:12Package registry (OSV)
Maven:org.jdom:jdom22.0.6.1Package registry (OSV)
opensuse:apiguardian1.1.2-150200.3.10.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:assertj-core3.25.3-150200.5.4.3 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:byte-buddy1.14.16-150200.5.7.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:dom4j2.1.4-150200.12.10.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:hamcrest2.2-150200.12.17.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:jaxen2.0.0-150200.5.3.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:jdom1.1.3-150200.12.8.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:jopt-simple5.0.4-150200.3.4.3 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:junit4.13.2-150200.3.15.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:junit55.10.2-150200.3.10.3 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:junit5-minimal5.10.2-150200.3.10.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:objectweb-asm9.7-150200.3.15.2 · openSUSE:Leap 15.5Package registry (OSV)
suse:apiguardian1.1.2-150200.3.10.2 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:assertj-core3.25.3-150200.5.4.3 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:byte-buddy1.14.16-150200.5.7.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:dom4j2.1.4-150200.12.10.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:hamcrest2.2-150200.12.17.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:jaxen2.0.0-150200.5.3.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:jdom1.1-150000.5.3.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOSPackage registry (OSV)
suse:jdom1.1.3-150200.12.8.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:jdom22.0.6-3.3.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP2Package registry (OSV)
suse:jopt-simple5.0.4-150200.3.4.3 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:junit4.13.2-150200.3.15.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:junit55.10.2-150200.3.10.3 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:objectweb-asm9.7-150200.3.15.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)
suse:xom1.3.9-150200.5.3.3 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-611 · Improper Restriction of XML External Entity Reference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (15 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records