How severe is CVE-2025-71279?

CVE-2025-71279 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-71279 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-71279?

CVE-2025-71279 affects Xenforo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-71279?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-71279 have an EU (EUVD) identifier?

Yes. CVE-2025-71279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209152.

When was CVE-2025-71279 published?

CVE-2025-71279 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2025-71279

CVE-2025-71279 is a critical-severity vulnerability in Xenforo with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209152
Weakness: CWE-287
Affected product: Xenforo
Published: 2026-04-01
Last modified: 2026-06-17

Description

XenForo before 2.3.7 contains a security issue affecting Passkeys that have been added to user accounts. An attacker may be able to compromise the security of Passkey-based authentication.

Frequently asked questions

What is CVE-2025-71279?: XenForo before 2.3.7 contains a security issue affecting Passkeys that have been added to user accounts. An attacker may be able to compromise the security of Passkey-based authentication.
How severe is CVE-2025-71279?: CVE-2025-71279 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-71279 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-71279?: CVE-2025-71279 affects Xenforo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-71279?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-71279 have an EU (EUVD) identifier?: Yes. CVE-2025-71279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209152.
When was CVE-2025-71279 published?: CVE-2025-71279 was published on 2026-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
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