CVE-2020-8541Network attack vector

Authenticated file disclosure via unsafe OpenXML parsing

Published Jun 16, 2020 · Updated Aug 4, 2024

XXE in OX App Suite 7.10.3 and earlier allows remote authenticated users to read local files through malicious OpenXML documents. The office document-conversion path unmarshals attacker-supplied XML with a stream reader that resolves external entities into local content or outbound HTTP requests. Exploitation requires an account and opening or editing an uploaded document; successful requests can expose server files and internal network resources.

CVSS severity7.7
High
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in OX App Suite 7.10.3 and earlier allows remote authenticated users to read local files through malicious OpenXML documents. The office document-conversion path unmarshals attacker-supplied XML with a stream reader that resolves external entities into local content or outbound HTTP requests. Exploitation requires an account and opening or editing an uploaded document; successful requests can expose server files and internal network resources.

The record

CVE
CVE-2020-8541
Published
Jun 16, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.7Open-Xchange GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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