CVE-2020-15139

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Summary

CVECVE-2020-15139
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-08-10 22:15:00 UTC
Updated2020-08-13 15:58:00 UTC
DescriptionIn MyBB before version 1.8.24, the custom MyCode (BBCode) for the visual editor doesn't escape input properly when rendering HTML, resulting in a DOM-based XSS vulnerability. The weakness can be exploited by pointing a victim to a page where the visual editor is active (e.g. as a post or Private Message) and operates on a maliciously crafted MyCode message. This may occur on pages where message content is pre-filled using a GET/POST parameter, or on reply pages where a previously saved malicious message is quoted. After upgrading MyBB to 1.8.24, make sure to update the version attribute in the `codebuttons` template for non-default themes to serve the latest version of the patched `jscripts/bbcodes_sceditor.js` file.

Risk And Classification

Problem Types: CWE-79

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mybb Mybb All All All All
Application Mybb Mybb All All All All

References

ReferenceSourceLinkTags
Fix MyCode message formatting XSS in visual editor · mybb/mybb@37ad29d · GitHub MISC github.com Patch, Third Party Advisory
MyCode message formatting XSS in visual editor · Advisory · mybb/mybb · GitHub CONFIRM github.com Patch, Third Party Advisory
Version 1.8.24 - MyBB MISC mybb.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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