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Cross-Site Request Forgery in xwiki-platform

High severity GitHub Reviewed Published Feb 4, 2022 in xwiki/xwiki-platform • Updated Feb 3, 2023

Package

maven org.xwiki.platform:xwiki-platform-administration-ui (Maven)

Affected versions

< 12.10.5
>= 13.0, <= 13.1

Patched versions

12.10.5
13.2RC1

Description

Impact

It's possible to know if a user has or not an account in a wiki related to an email address, and which username(s) is actually tight to that email by forging a request to the Forgot username page. Note that since this page does not have a CSRF check it's quite easy to perform a lot of those requests.

Patches

This issue has been patched in XWiki 12.10.5 and 13.2RC1. Two different patches are provided:

  • a first one to fix the CSRF problem
  • a more complex one that now relies on sending an email for the Forgot username process.

Workarounds

It's possible to fix the problem without uprading by editing the ForgotUsername page in version below 13.x, to use the following code: https://github.com/xwiki/xwiki-platform/blob/69548c0320cbd772540cf4668743e69f879812cf/xwiki-platform-core/xwiki-platform-administration/xwiki-platform-administration-ui/src/main/resources/XWiki/ForgotUsername.xml#L39-L123

In version after 13.x it's also possible to edit manually the forgotusername.vm file, but it's really encouraged to upgrade the version here.

References

For more information

If you have any questions or comments about this advisory:

References

@surli surli published to xwiki/xwiki-platform Feb 4, 2022
Published by the National Vulnerability Database Feb 4, 2022
Reviewed Feb 7, 2022
Published to the GitHub Advisory Database Feb 10, 2022
Last updated Feb 3, 2023

Severity

High

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
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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:U/C:H/I:N/A:N

EPSS score

0.257%
(66th percentile)

Weaknesses

CVE ID

CVE-2021-32732

GHSA ID

GHSA-vh5c-jqfg-mhrh

Source code

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