MyBB up to 1.8.23 Visual Editor [align]/[size]/[quote]/[font] cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in MyBB up to 1.8.23. Impacted is an unknown function of the component Visual Editor. Performing a manipulation of the argument [align]/[size]/[quote]/[font] as part of MyCode results in cross site scripting. This vulnerability is reported as CVE-2020-17447. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in MyBB up to 1.8.23 (Content Management System). This affects some unknown processing of the component Visual Editor. The manipulation of the argument [align]/[size]/[quote]/[font] as part of a MyCode leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity. The summary by CVE is:

MyBB before 1.8.24 allows XSS because the visual editor mishandles [align], [size], [quote], and [font] in MyCode.

The weakness was disclosed 08/09/2020. This vulnerability is uniquely identified as CVE-2020-17447 since 08/09/2020. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 1.8.24 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best 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
• 1.8.20
• 1.8.21
• 1.8.22
• 1.8.23

License

• open-source

Website

• Product: https://mybb.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion