CVE catalog

CVE-2021-3377

node-ansi-up affected and fixed versions

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.

Severity: Medium · CVSS 4.6CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Published: Jan 29, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 8.00% · Oct 27, 2026

Projects and upstream resources

[node-ansi-up][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debiantrixie	node-ansi-up	`5.1.0+dfsg-2`	Fixed	[CVE-2021-3377]
Debiansid	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debiansid	node-ansi-up	`5.1.0+dfsg-4`	Fixed	[CVE-2021-3377]
Debianforky	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debianforky	node-ansi-up	`5.1.0+dfsg-4`	Fixed	[CVE-2021-3377]
Debianbookworm	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debianbookworm	node-ansi-up	`5.1.0+dfsg-2`	Fixed	[CVE-2021-3377]

Showing 8 fix observations. All 11 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debianbookworm	node-ansi-up	`5.1.0+dfsg-2`	Fixed	[CVE-2021-3377]
Debianforky	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debianforky	node-ansi-up	`5.1.0+dfsg-4`	Fixed	[CVE-2021-3377]
Debiansid	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debiansid	node-ansi-up	`5.1.0+dfsg-4`	Fixed	[CVE-2021-3377]
Debiantrixie	node-ansi-up	`5.0.0+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2021-3377]
Debiantrixie	node-ansi-up	`5.1.0+dfsg-2`	Fixed	[CVE-2021-3377]
Ubuntu20.04	node-ansi-up	`4.0.3+dfsg-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-3377]Oct 24, 2025, 4:49:10 AM UTC
Ubuntu22.04	node-ansi-up	`5.0.0+dfsg-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-3377]Oct 24, 2025, 4:49:10 AM UTC
Ubuntu22.04	node-ansi-up	`5.1.0+dfsg-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-3377]Oct 24, 2025, 4:49:10 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "node-ansi-up",
      "status": "fixed",
      "release": "sid",
      "version": "5.1.0+dfsg-4"
    },
    {
      "name": "node-ansi-up",
      "status": "fixed",
      "release": "forky",
      "version": "5.1.0+dfsg-4"
    },
    {
      "name": "node-ansi-up",
      "status": "fixed",
      "release": "trixie",
      "version": "5.1.0+dfsg-2"
    },
    {
      "name": "node-ansi-up",
      "status": "fixed",
      "release": "bookworm",
      "version": "5.1.0+dfsg-2"
    }
  ],
  "fixed_versions": [
    {
      "bug": 984667,
      "name": "node-ansi-up",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "5.0.0+dfsg-1"
    },
    {
      "bug": 984667,
      "name": "node-ansi-up",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "5.0.0+dfsg-1"
    },
    {
      "bug": 984667,
      "name": "node-ansi-up",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "5.0.0+dfsg-1"
    },
    {
      "bug": 984667,
      "name": "node-ansi-up",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "5.0.0+dfsg-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "node-ansi-up",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "4.0.3+dfsg-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-3377",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-3377",
      "provider_updated_at": "2025-10-24T04:49:10Z",
      "applicability_unknown": true
    },
    {
      "name": "node-ansi-up",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "5.0.0+dfsg-1",
        "5.1.0+dfsg-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-3377",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-3377",
      "provider_updated_at": "2025-10-24T04:49:10Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #984667]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libjs-ansi-up]Unknown
Source package: [node-ansi-up]
Details (2)
- 5.1.0+dfsg-2 · all · bookworm
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · bookworm; dsa · node-ansi-up · debian · 12
- 5.1.0+dfsg-2 · all · bookworm
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · bookworm; dsa · node-ansi-up · debian · 12
[node-ansi-up]Unknown
Details (2)
- 5.1.0+dfsg-2 · all · bookworm
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · bookworm; dsa · node-ansi-up · debian · 12
- 5.1.0+dfsg-2 · all · bookworm
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · bookworm; dsa · node-ansi-up · debian · 12

[Debian 13 (Trixie)]

[libjs-ansi-up]Unknown
Source package: [node-ansi-up]
Details (2)
- 5.1.0+dfsg-2 · all · trixie
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · 13
- 5.1.0+dfsg-2 · all · trixie
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · 13
[node-ansi-up]Unknown
Details (2)
- 5.1.0+dfsg-2 · all · trixie
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · 13
- 5.1.0+dfsg-2 · all · trixie
  Fixed · Fixed: 5.0.0+dfsg-1
  dsa · node-ansi-up · debian · 13

Observed: Oct 23, 2026, 5:58:01 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]