CVE-2021-3377

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.

CVSS v3 6.1 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://doyensec.com/resources/Doyensec_Advisory_ansi_up4_XSS.pdf	Exploit Third Party Advisory
https://github.com/drudru/ansi_up/commit/c8c726ed1db979bae4f257b7fa41775155ba2e27	Patch Third Party Advisory
https://doyensec.com/resources/Doyensec_Advisory_ansi_up4_XSS.pdf	Exploit Third Party Advisory
https://github.com/drudru/ansi_up/commit/c8c726ed1db979bae4f257b7fa41775155ba2e27	Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20241108-0002/

Configurations

Configuration 1 (hide)

cpe:2.3:a:ansi_up_project:ansi_up:*:*:*:*:*:node.js:*:*

History

03 Nov 2025, 22:15

Type	Values Removed	Values Added
References		() https://security.netapp.com/advisory/ntap-20241108-0002/ -

Information

Published : 2021-03-05 21:15

Updated : 2025-11-03 22:15

NVD link : CVE-2021-3377

Mitre link : CVE-2021-3377

CVE.ORG link : CVE-2021-3377

JSON object : View

Products Affected

ansi_up_project

ansi_up

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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