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.

• CWE-611

• https://alephsecurity.com/vulns/aleph-2021003Exploit, Third Party Advisory
• https://github.com/hunterhacker/jdom/pull/188Patch, Third Party Advisory
• https://github.com/hunterhacker/jdom/releasesRelease Notes, Third Party Advisory
• https://lists.apache.org/thread.html/r21c406c7ed88fe340db7dbae75e58355159e6c324037c7d5547bf40b%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/r845e987b7cd8efe610284958e997b84583f5a98d3394adc09e3482fe%40%3Cissues.solr.apache.org%3E
• https://lists.apache.org/thread.html/r89b3800cfabb1e773e49425e5d4239c28a659839a2eca6af3431482e%40%3Cissues.solr.apache.org%3E
• 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/rfb7a93e40ebeb1e0068cde0bf3834dcab46bb1ef06d6424db48ed9fd%40%3Cdev.tika.apache.org%3E
• https://lists.debian.org/debian-lts-announce/2021/06/msg00026.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/07/msg00012.htmlMailing List, Third Party Advisory
• 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.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlNot Applicable
• https://alephsecurity.com/vulns/aleph-2021003Exploit, Third Party Advisory
• https://github.com/hunterhacker/jdom/pull/188Patch, Third Party Advisory
• https://github.com/hunterhacker/jdom/releasesRelease Notes, Third Party Advisory
• https://lists.apache.org/thread.html/r21c406c7ed88fe340db7dbae75e58355159e6c324037c7d5547bf40b%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/r845e987b7cd8efe610284958e997b84583f5a98d3394adc09e3482fe%40%3Cissues.solr.apache.org%3E
• https://lists.apache.org/thread.html/r89b3800cfabb1e773e49425e5d4239c28a659839a2eca6af3431482e%40%3Cissues.solr.apache.org%3E
• 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/rfb7a93e40ebeb1e0068cde0bf3834dcab46bb1ef06d6424db48ed9fd%40%3Cdev.tika.apache.org%3E
• https://lists.debian.org/debian-lts-announce/2021/06/msg00026.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/07/msg00012.htmlMailing List, Third Party Advisory
• 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.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlNot Applicable

Published

Jun 16, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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