{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-15139",
        "STATE": "PUBLIC",
        "TITLE": "XSS in MyBB"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "MyBB",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.8.24"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "MyBB"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "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."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/mybb/mybb/security/advisories/GHSA-37h7-vfv6-f8rj",
                "refsource": "CONFIRM",
                "url": "https://github.com/mybb/mybb/security/advisories/GHSA-37h7-vfv6-f8rj"
            },
            {
                "name": "https://github.com/mybb/mybb/commit/37ad29dcd25489a37bdd89ebac761f22492558b0",
                "refsource": "MISC",
                "url": "https://github.com/mybb/mybb/commit/37ad29dcd25489a37bdd89ebac761f22492558b0"
            },
            {
                "name": "https://mybb.com/versions/1.8.24/",
                "refsource": "MISC",
                "url": "https://mybb.com/versions/1.8.24/"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-37h7-vfv6-f8rj",
        "discovery": "UNKNOWN"
    }
}