vBulletin up to 5.7.5/6.0.3 api.php?method=protectedMethod improper protection of alternate path

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in vBulletin up to 5.7.5/6.0.3. Affected by this vulnerability is an unknown functionality of the file /api.php?method=protectedMethod. The manipulation results in improper protection of alternate path. This vulnerability is reported as CVE-2025-48827. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, was found in vBulletin up to 5.7.5/6.0.3. Affected is an unknown functionality of the file /api.php?method=protectedMethod. The manipulation with an unknown input leads to a improper protection of alternate path vulnerability. CWE is classifying the issue as CWE-424. The product does not sufficiently protect all possible paths that a user can take to access restricted functionality or resources. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at karmainsecurity.com. This vulnerability is traded as CVE-2025-48827 since 05/27/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/25/2025).

It is declared as attacked.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 10.0
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper protection of alternate path
CWE: CWE-424
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/27/2025 Advisory disclosed
05/27/2025 +0 days CVE reserved
05/27/2025 +0 days VulDB entry created
06/25/2025 +29 days VulDB entry last update

Sourcesinfo

Advisory: karmainsecurity.com
Status: Confirmed

CVE: CVE-2025-48827 (🔒)
GCVE (CVE): GCVE-0-2025-48827
GCVE (VulDB): GCVE-100-310332
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/27/2025 07:39
Updated: 06/25/2025 19:33
Changes: 05/27/2025 07:39 (61), 05/27/2025 10:29 (1), 06/04/2025 15:40 (4), 06/04/2025 15:41 (2), 06/25/2025 19:33 (11)
Complete: 🔍
Cache ID: 216::103

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