CVE-2023-4554Network attack vector

Server file disclosure and SSRF via XXE

Published Jan 29, 2024 · Updated May 29, 2025

XXE in OpenText AppBuilder 21.2 through 23.1 allows remote authenticated users to read server files or trigger SSRF. The XML processor accepts specially crafted uploaded XML and resolves attacker-controlled external entities without restricting their target resources. A high-privilege AppBuilder account is required; successful requests disclose files readable by the server process or make the server contact attacker-selected endpoints.

CVSS severity4.9
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in OpenText AppBuilder 21.2 through 23.1 allows remote authenticated users to read server files or trigger SSRF. The XML processor accepts specially crafted uploaded XML and resolves attacker-controlled external entities without restricting their target resources. A high-privilege AppBuilder account is required; successful requests disclose files readable by the server process or make the server contact attacker-selected endpoints.

The record

CVE
CVE-2023-4554
Published
Jan 29, 2024
Updated
May 29, 2025
Vendor
OpenText
Product
AppBuilder
Classifications
CWE-611, CAPEC-664, CAPEC-639, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=21.2 <23.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenText · AppBuilderversion=21.2 <23.2

Published CVSS scores

4.9OpenTextCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
CAPEC-664Server Side Request Forgery
CAPEC-639Probe System Files
T1005Data from Local System

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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