{
"id": "GHSA-2v5f-23xc-v9qr",
"aliases": [
"CVE-2021-3377"
],
"details": "The npm package ansi_up converts ANSI escape codes into HTML. In ansi_up v4, ANSI escape codes can be used to create HTML hyperlinks. Due to insufficient URL sanitization, this feature is affected by a cross-site scripting (XSS) vulnerability. This issue is fixed in v5.0.0.",
"summary": "ansi_up cross-site scripting vulnerability",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0.0"
}
]
}
],
"package": {
"name": "ansi_up",
"ecosystem": "npm"
}
}
],
"modified": "2025-11-04T16:33:40Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"published": "2021-03-11T22:50:39Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3377",
"type": "ADVISORY"
},
{
"url": "https://github.com/drudru/ansi_up/commit/c8c726ed1db979bae4f257b7fa41775155ba2e27",
"type": "WEB"
},
{
"url": "https://doyensec.com/resources/Doyensec_Advisory_ansi_up4_XSS.pdf",
"type": "WEB"
},
{
"url": "https://security.netapp.com/advisory/ntap-20241108-0002",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2021-03-05T21:15:00Z",
"github_reviewed_at": "2021-03-11T22:49:55Z"
}
}