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CVE-2025-48828

CRITICAL
Published 2025-05-27T00:00:00.000Z
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Expert Analysis

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CVSS Score

V3.1
9.0
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.087
probability
of exploitation in the wild

There is a 8.7% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.920
Higher than 92.0% of all CVEs

Attack Vector Metrics

Attack Vector
Not Available
Attack Complexity
Not Available
Privileges Required
Not Available
User Interaction
Not Available
Scope
Not Available

Impact Metrics

Confidentiality
Not Available
Integrity
Not Available
Availability
Not Available

Description

Certain vBulletin versions might allow attackers to execute arbitrary PHP code by abusing Template Conditionals in the template engine. By crafting template code in an alternative PHP function invocation syntax, such as the "var_dump"("test") syntax, attackers can bypass security checks and execute arbitrary PHP code, as exploited in the wild in May 2025.

Available Exploits

vBulletin replaceAdTemplate - Remote Code Execution

vBulletin versions 5.0.0 through 6.0.3 contain a Remote Code Execution (RCE) vulnerability in the ajax/api/ad/replaceAdTemplate endpoint. This flaw arises from improper use of PHP's Reflection API, allowing unauthenticated attackers to invoke protected controller methods. By injecting a crafted <vb:if> conditional that executes arbitrary PHP code via passthru($_POST[<param>]), and triggering it with a second request to ajax/render/ad_<location>, attackers can run arbitrary commands on the server as the webserver user.

ID: CVE-2025-48828
Author: DhiyaneshDKChocapikk Critical

References:

Related News

Two flaws in vBulletin forum software are under attack

Experts found two vulnerabilities in the vBulletin forum software, one of which is already being exploited in real-world attacks. Two critical vBulletin flaws, tracked as CVE-2025-48827 and CVE-2025-48828, enable API abuse and remote code execution. The exper…

Securityaffairs.com 2025-06-01 13:50
Read More

Affected Products

vBulletin

vBulletin

Affected Versions:

6.0.3

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed CRITICAL

GHSA-58pj-rcxg-3vhg

Advisory Details

Certain vBulletin versions might allow attackers to execute arbitrary PHP code by abusing Template Conditionals in the template engine. By crafting template code in an alternative PHP function invocation syntax, such as the "var_dump"("test") syntax, attackers can bypass security checks and execute arbitrary PHP code.

CVSS Scoring

CVSS Score

9.0

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-48828
WEB https://blog.kevintel.com/vbulletin-replaceadtemplate-kev
WEB https://karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce
WEB https://kevintel.com/CVE-2025-48828

Advisory provided by GitHub Security Advisory Database. Published: May 27, 2025, Modified: May 27, 2025

Social Media Intelligence

Real-time discussions and threat intelligence from social platforms

1 post
Reddit • 2 months, 2 weeks ago
lubyruffy

vBulletin Remote Code Execution Vulnerabilities Exploited in the Wild (CVE-2025-48827 & CVE-2025-48828)

Also mentions: CVE-2025-48827
1
1.0
View Original

References

https://karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce
https://kevintel.com/CVE-2025-48828
Published: 2025-05-27T00:00:00.000Z
Last Modified: 2025-05-27T18:04:16.774Z
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