jforum 2.1.8 username User input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability has been found in jforum 2.1.8 (Forum Software) and classified as problematic. This vulnerability affects some unknown functionality of the file register/check/username?username. The manipulation with an unknown input leads to a input validation vulnerability (User). The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. CVE summarizes:

In JForum 2.1.8, an unauthenticated, remote attacker can enumerate whether a user exists by using the "create user" function. If a register/check/username?username= request corresponds to a username that exists, then an "is already in use" error is produced. NOTE: this product is discontinued.

The bug was discovered 02/05/2019. The weakness was released 02/12/2019. This vulnerability was named CVE-2019-7550 since 02/06/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k.

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

Entries connected to this vulnerability are available at VDB-63634, VDB-65002, VDB-65914 and VDB-202318.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
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VulDB Reliability: 🔍

NVD Base Score: 5.3
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VulDB Base Score: 🔍
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Name: User
Class: Input validation / User

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


02/05/2019 🔍
02/06/2019 +1 days 🔍
02/12/2019 +6 days 🔍
02/13/2019 +1 days 🔍
07/10/2023 +1608 days 🔍


Advisory: criticalstart.com
Status: Not defined

CVE: CVE-2019-7550 (🔍)
See also: 🔍


Created: 02/13/2019 02:10 PM
Updated: 07/10/2023 09:36 AM
Changes: 02/13/2019 02:10 PM (55), 05/10/2020 11:33 AM (1), 07/10/2023 09:36 AM (3)
Complete: 🔍
Cache ID: 44:494:40


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