CVE-2021-43776 Vulnerability Details

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CVE-2021-43776 Metadata Quick Info

CVE Published: 26/11/2021 | CVE Updated: 04/08/2024 | CVE Year: 2021
Source: GitHub_M | Vendor: backstage | Product: backstage
Status : PUBLISHED

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CVE-2021-43776 Description

Backstage is an open platform for building developer portals. In affected versions the auth-backend plugin allows a malicious actor to trick another user into visiting a vulnerable URL that executes an XSS attack. This attack can potentially allow the attacker to exfiltrate access tokens or other secrets from the user\'s browser. The default CSP does prevent this attack, but it is expected that some deployments have these policies disabled due to incompatibilities. This is vulnerability is patched in version `0.4.9` of `@backstage/plugin-auth-backend`.

Metrics

CVSS Version: 3.1 | Base Score: 7.4 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

l➤ Exploitability Metrics:
    Attack Vector (AV)* NETWORK
    Attack Complexity (AC)* LOW
    Privileges Required (PR)* NONE
    User Interaction (UI)* REQUIRED
    Scope (S)* CHANGED

l➤ Impact Metrics:
    Confidentiality Impact (C)* HIGH
    Integrity Impact (I)* NONE
    Availability Impact (A)* NONE

Weakness Enumeration (CWE)

CWE-ID: CWE-79
CWE Name: CWE-79: Improper Neutralization of Input During Web Page Generation ( Cross-site Scripting )
Source: backstage

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-ID:
CAPEC Description:


Source: NVD (National Vulnerability Database).