Detections
Analytics
SCA: security update for @backstage/plugin-auth-backend (GHSA-w7fj-336r-vw49)
medium Tenable Self-Hosted Container Security Plugin ID 419784
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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`. (CVE-2021-43776)
See Also
Plugin Details
Severity: Medium
ID: 419784
Version: Revision 1.6
Type: Local
Family: SCA Checks
Published: 1/23/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 2.3
Percentile: 8.67
Vendor
Vendor Severity: High
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2021-43776
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 12/1/2021
Vulnerability Publication Date: 11/26/2021
Reference Information
CVE: CVE-2021-43776
cwe: CWE-79