CVE-2025-71279Network attack vector

Unauthenticated compromise of Passkey authentication

Published Apr 1, 2026 · Updated Apr 1, 2026

Improper authentication in XenForo 2.3.0 through 2.3.6 allows remote attackers to compromise Passkey-based authentication. XenForo identifies the affected locus only as Passkeys added to user accounts and has not disclosed the faulty authentication operation. No privileges or user interaction are required, but the vendor has not described the resulting account actions or data exposure.

CVSS severity9.3
Critical
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in XenForo 2.3.0 through 2.3.6 allows remote attackers to compromise Passkey-based authentication. XenForo identifies the affected locus only as Passkeys added to user accounts and has not disclosed the faulty authentication operation. No privileges or user interaction are required, but the vendor has not described the resulting account actions or data exposure.

The record

CVE
CVE-2025-71279
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
XenForo Ltd.
Product
XenForo
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 2026Record 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=2.3.0 <2.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

XenForo Ltd. · XenForoversion=2.3.0 <2.3.7

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-287Improper Authentication
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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