MyBB up to 1.8.19 index.php upsetting[bburl] Reflected cross site scripting

Summaryinfo

A vulnerability was found in MyBB. It has been declared as problematic. This vulnerability affects unknown code of the file index.php. The manipulation of the argument upsetting[bburl] as part of Parameter results in cross site scripting (Reflected). This vulnerability is identified as CVE-2018-19202. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in MyBB (Content Management System). Affected is some unknown processing of the file index.php. The manipulation of the argument upsetting[bburl] as part of a Parameter leads to a cross site scripting vulnerability (Reflected). CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

A reflected XSS vulnerability in index.php in MyBB 1.8.x through 1.8.19 allows remote attackers to inject JavaScript via the 'upsetting[bburl]' parameter.

The weakness was released 04/11/2019 (Website). The advisory is shared for download at blog.mybb.com. This vulnerability is traded as CVE-2018-19202 since 11/12/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/29/2020). The MITRE ATT&CK project declares the attack technique as T1059.007.

By approaching the search of inurl:index.php it is possible to find vulnerable targets with Google Hacking.

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

• Content Management System

Name

• MyBB

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3
• 1.8.4
• 1.8.5
• 1.8.6
• 1.8.7
• 1.8.8
• 1.8.9
• 1.8.10
• 1.8.11
• 1.8.12
• 1.8.13
• 1.8.14
• 1.8.15
• 1.8.16
• 1.8.17
• 1.8.18
• 1.8.19

License

• open-source

Website

• Product: https://mybb.com/

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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