Vulnerability Details : CVE-2021-40439

Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a "Billion Laughs" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.
Published 2021-10-07 16:15:09
Updated 2021-10-15 13:01:58
Source Apache Software Foundation
View at NVD,   CVE.org
Vulnerability category: XML external entity (XXE) injectionDenial of service

Products affected by CVE-2021-40439

Exploit prediction scoring system (EPSS) score for CVE-2021-40439

EPSS FAQ
0.33%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-40439

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
 MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P
8.6
2.9
 NIST
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
2.8
3.6
 NIST

CWE ids for CVE-2021-40439

  • The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
    Assigned by:
    • nvd@nist.gov (Primary)
    • security@apache.org (Secondary)

References for CVE-2021-40439

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