CVE-2020-15139

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Source
https://cve.org/CVERecord?id=CVE-2020-15139
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15139.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-15139
Aliases
  • GHSA-37h7-vfv6-f8rj
Published
2020-08-10T22:15:14.223Z
Modified
2026-07-08T05:59:52.137464281Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

In 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.

Database specific 
{
    "unresolved_ranges": [
        {
            "vendor_product": "mybb:mybb",
            "extracted_events": [
                {
                    "fixed": "1.8.24"
                }
            ],
            "cpes": [
                "cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*"
            ],
            "source": "CPE_RANGE"
        },
        {
            "extracted_events": [
                {
                    "fixed": "1.8.24"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/mybb/mybb

Affected ranges

Type
GIT
Repo
https://github.com/mybb/mybb
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
37ad29dcd25489a37bdd89ebac761f22492558b0
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

Other
mybb_1800
mybb_1801
mybb_1804
mybb_1805
mybb_1806
mybb_1807
mybb_1808
mybb_1809
mybb_1810
mybb_1811
mybb_1812
mybb_1813
mybb_1814
mybb_1815
mybb_1815_build
mybb_1816
mybb_1816_build
mybb_1817
mybb_1817_build
mybb_1818
mybb_1818_build
mybb_1819
mybb_1819_build
mybb_1820
mybb_1820-rc
mybb_1820_build
mybb_1821
mybb_1821_build
mybb_1821pl1
mybb_1822
mybb_1822_build
mybb_1823
mybb_1823_build

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15139.json"