CVE-2025-54477Network attack vector

Unauthenticated account enumeration via passkey request discrepancies

Published Sep 30, 2025 · Updated Sep 30, 2025

User enumeration in Joomla! CMS 4.0.0 through 4.4.13 and 5.0.0 through 5.3.3 allows remote attackers to identify valid accounts. Joomla attributes the flaw to improper handling of passkey authentication requests but has not published the specific response discrepancy or affected code locus. Unauthenticated network access to the passkey authentication method is sufficient, and the reported consequence is limited to disclosure of account validity.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

User enumeration in Joomla! CMS 4.0.0 through 4.4.13 and 5.0.0 through 5.3.3 allows remote attackers to identify valid accounts. Joomla attributes the flaw to improper handling of passkey authentication requests but has not published the specific response discrepancy or affected code locus. Unauthenticated network access to the passkey authentication method is sufficient, and the reported consequence is limited to disclosure of account validity.

The record

CVE
CVE-2025-54477
Published
Sep 30, 2025
Updated
Sep 30, 2025
Vendor
Joomla! Project
Product
Joomla! CMS
Classifications
CWE-203, CAPEC-575, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 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=4.0.0-4.4.13
  2. Affected versionversion=5.0.0-5.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Joomla! Project · Joomla! CMSversion=4.0.0-4.4.13; version=5.0.0-5.3.3

Published CVSS scores

5.3CISA-ADPCVSS: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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