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CVE-2025-48827

Quick assessment

Affected
vBulletin vBulletin
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Internet Brands vBulletin是Internet Brands公司的一个论坛插件。 Internet Brands vBulletin 5.0.0至5.7.5版本和6.0.0至6.0.3版本存在安全漏洞，该漏洞源于未经身份验证的用户可能调用受保护的API控制器方法。

CVSS 10.0 · Critical EPSS 77.46% · P100

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-48827

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对候选路径的不恰当保护
Source: CVE Program / CVE List V5
Vulnerability Title
Internet Brands vBulletin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Internet Brands vBulletin是Internet Brands公司的一个论坛插件。 Internet Brands vBulletin 5.0.0至5.7.5版本和6.0.0至6.0.3版本存在安全漏洞，该漏洞源于未经身份验证的用户可能调用受保护的API控制器方法。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
vBulletin vBulletin 5.0.0 ~ 5.7.5 -

II. Public POCs for CVE-2025-48827

# POC Description Source Link Shenlong Link
1 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 contain an authentication bypass caused by unauthenticated access to protected API controllers on PHP 8.1 or later, letting unauthenticated attackers invoke protected methods remotely.Starting from PHP 8.1, due to an internal adjustment to handling of ReflectionMethod::invoke() and similar methods, it now allows — by default — invocation of protected / private methods when using PHP's Reflection API. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-48827.yaml POC Details
2 Critical Unauthenticated API Access in vBulletin https://github.com/0xgh057r3c0n/CVE-2025-48827 POC Details
3 Vbullettin RCE - CVE-2025-48827 https://github.com/wiseep/CVE-2025-48827 POC Details
4 This repository contains a proof-of-concept exploit for CVE-2025-48827, a critical authentication bypass vulnerability affecting vBulletin 5.0.0–5.7.5 and 6.0.0–6.0.3 when running on PHP 8.1 or later. The vulnerability allows unauthenticated attackers to invoke protected API methods remotely. https://github.com/SystemVll/CVE-2025-48827 POC Details
5 Critical Unauthenticated API Access in vBulletin https://github.com/zr1p3r/CVE-2025-48827 POC Details
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III. Intelligence Information for CVE-2025-48827

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Security Blog Posts for CVE-2025-48827 (1)

IV. Related Vulnerabilities

Same product: vBulletin
Same vendor: vBulletin
Same weakness: CWE-424

V. Comments for CVE-2025-48827

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