CVE-2023-24603Network attack vector

Authenticated service lockup via unbounded external downloads

Published May 29, 2023 · Updated Jan 14, 2025

Uncontrolled resource consumption in OX App Suite backend 7.10.6-rev36 and 8.9 allows remote authenticated users to cause a temporary service lockup. The middleware HTTP client continues downloading attacker-controlled external resources after configured content-size limits are exceeded. A user account and a feature that fetches an attacker-controlled resource, such as an iCal feed, are required; the bounded result is a temporary processing lockup.

CVSS severity4.3
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in OX App Suite backend 7.10.6-rev36 and 8.9 allows remote authenticated users to cause a temporary service lockup. The middleware HTTP client continues downloading attacker-controlled external resources after configured content-size limits are exceeded. A user account and a feature that fetches an attacker-controlled resource, such as an iCal feed, are required; the bounded result is a temporary processing lockup.

The record

CVE
CVE-2023-24603
Published
May 29, 2023
Updated
Jan 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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?

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

4.3Open-Xchange GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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