Vulnerability Details : CVE-2021-20838

Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition by processing a specially crafted XML document.
Published 2021-11-01 02:15:07
Updated 2021-11-08 19:04:43
Source JPCERT/CC
View at NVD,   CVE.org
Vulnerability category: XML external entity (XXE) injectionDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2021-20838

EPSS FAQ
0.28%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 69 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20838

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
 NIST
7.5
 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
 NIST

CWE ids for CVE-2021-20838

  • 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)

References for CVE-2021-20838

Products affected by CVE-2021-20838

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