CVE-2025-24391Network attack vector

Unauthenticated email-address enumeration via response discrepancies

Published Jul 14, 2025 · Updated Jul 14, 2025

Observable discrepancies in OTRS 7.0.x, 8.0.x, 2023.x, 2024.x, and 2025.5.x and earlier allow remote attackers to enumerate users. The External Interface returns different HTTP response codes and messages according to whether a submitted email address belongs to an existing account. No authentication or user interaction is required, and the disclosed validity of email addresses enables focused follow-on targeting.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable discrepancies in OTRS 7.0.x, 8.0.x, 2023.x, 2024.x, and 2025.5.x and earlier allow remote attackers to enumerate users. The External Interface returns different HTTP response codes and messages according to whether a submitted email address belongs to an existing account. No authentication or user interaction is required, and the disclosed validity of email addresses enables focused follow-on targeting.

The record

CVE
CVE-2025-24391
Published
Jul 14, 2025
Updated
Jul 14, 2025
Vendor
Centuran Consulting
Product
OTRS
Classifications
CWE-203, CAPEC-575, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 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?

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

  1. Affected versionversion=2023.x
  2. Affected versionversion=2024.x
  3. Affected versionversion=2025.x <=2025.5.x
  4. Affected versionversion=7.0.x
  5. Affected versionversion=8.0.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Centuran Consulting · OTRSversion=2023.x; version=2024.x; version=2025.x <=2025.5.x; version=7.0.x; version=8.0.x

Published CVSS scores

5.3OTRS AGCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
CAPEC-575Account Footprinting
T1087Account Discovery

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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