XXE in Apache Xmlbeans
CVE-2021-23926
The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from malicious XML input. Vulnerabilities include possibilities for XML Entity Expansion attacks. Affects XMLBeans up to and including v2.6.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.063 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.062 · newest: 0.063 · change: +0.001
Affected products
- Apache Xmlbeans
- Apache Software Foundation Xmlbeans — versions Apache XMLBeans
- NetApp Oncommand Unified Manager Core Package
- NetApp Snap Creator Framework
- NetApp Snapmanager
- Oracle Middleware Common Libraries And Tools — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Peoplesoft Enterprise Peopletools — versions 8.57, 8.58, 8.59
- Debian Linux — versions 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- poi.apache.org/ (Product, Vendor Advisory)
- issues.apache.org/jira/browse/XMLBEANS-517 (Issue Tracking, Vendor Advisory)
- lists.apache.org/thread.html/r2dc5588009dc9f0310b7382269f932cc96cae4c3901b747dd… (mailing-list)
- lists.apache.org/thread.html/rbb01d10512098894cd5f22325588197532c64f1c818ea7e41… (mailing-list)
- lists.debian.org/debian-lts-announce/2021/06/msg00024.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210513-0004/ (Third Party Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-23926?
- CVE-2021-23926 is a critical-severity vulnerability in Apache Xmlbeans, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 9.1/10. Published 2021-01-14.
- How severe is CVE-2021-23926?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-23926 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.