CVE-2025-48827Known exploitationPublic exploitNetwork attack vector

Unauthenticated access to protected API methods

Published May 27, 2025 · Updated May 27, 2025

Improper access control in vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows remote attackers to invoke protected API methods. vB_Api_Wrapper::callNamed routes a user-selected method to vB_Api::callNamed, which calls ReflectionMethod::invokeArgs without enforcing method visibility. Exposure requires PHP 8.1 or later; reachable protected methods can alter templates and enable arbitrary code execution when chained with template injection.

CVSS severity10.0
Critical
EPSS probability75.84%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows remote attackers to invoke protected API methods. vB_Api_Wrapper::callNamed routes a user-selected method to vB_Api::callNamed, which calls ReflectionMethod::invokeArgs without enforcing method visibility. Exposure requires PHP 8.1 or later; reachable protected methods can alter templates and enable arbitrary code execution when chained with template injection.

The record

CVE
CVE-2025-48827
Published
May 27, 2025
Updated
May 27, 2025
Vendor
vBulletin
Product
vBulletin
Classifications
CWE-424, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 1, 2025Exploitation reportedExploitation in the wild during May 2025
  2. May 27, 2025CVE publishedPublication date reported by the CVE source.
  3. May 27, 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=5.0.0 <=5.7.5
  2. Affected versionversion=6.0.0 <=6.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vBulletin · vBulletinversion=5.0.0 <=5.7.5; version=6.0.0 <=6.0.3

Published CVSS scores

10.0MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NIST NVDCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-424Improper Protection of Alternate Path
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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