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Vulnerabilities

Vulnerability · CVE-2025-48827

vBulletin vBulletin Improper Protection of Alternate Path

Published May 26, 2025 · catalog updated May 27, 2025 · vBulletin vBulletin

Patch now

CVE-2025-48827 is in the CISA known-exploited catalog. Confirm vBulletin vBulletin against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical10.0
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
75.84%
Remediation
Remediation guidance
Affected products
vendor vBulletin vBulletin · vendor vBulletin vBulletin 6.0.0 ≤6.0.3

vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025. VulnCheck canary evidence. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor vBulletin vBulletinversion unspecified
  • vendor vBulletin vBulletin 6.0.0 ≤6.0.36.0.0 ≤6.0.3

How to fix CVE-2025-48827

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-48827 is in the CISA known-exploited catalog. Confirm vBulletin vBulletin against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with vBulletin vBulletin 6.0.0 ≤6.0.3 6.0.0 ≤6.0.3. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 75.84%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 26, 2025 · VulnCheck KEV

    Detected

    vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025. VulnCheck canary evidence. Initial-access exploit intelligence.

  2. May 26, 2025 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. May 27, 2025 · EUVD

    Updated

    vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025.

Sources

  • CVE.orgVulnerability recordCVE-2025-48827

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-48827

    30-day exploitation probability 75.8%

    first.org
  • EUVDVulnerability recordEUVD-2025-28267

    vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025.

    euvd.enisa.europa.eu
  • VulnCheck KEVConfirmed exploitationCVE-2025-48827

    vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.