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This repository has been archived by the owner on Dec 21, 2022. It is now read-only.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') and Improper Encoding or Escaping of Output in server.py

Critical
benjjvi published GHSA-3xpp-rhqx-cw96 Jan 29, 2022

Package

server.py (Flask)

Affected versions

>private.debug.3

Patched versions

None

Description

Impact

What kind of vulnerability is it? Who is impacted?
This vulnerability is a XSS and Improper Encoding vulnerability. AFAIK, only servers are impacted.

Patches

Has the problem been patched? What versions should users upgrade to?
No patches have been released yet.
As of commit 24f43aa, the issue has been fixed. No official releases are affected. Commits 7f9dd66, b39ad02, 96cc9f2, 4d0f88b, c29b3c8, 953fd83, 355a474, and 54b02d9 are all still vulnerable.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?
Users can manually add escaping to the server and client, or upgrade to commit 24f43aa.

For more information

If you have any questions or comments about this advisory:

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L

CVE ID

CVE-2022-23603

Weaknesses