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Improper Input Validation in GlobalNewFiles

Moderate
RhinosF1 published GHSA-57p5-hqjq-h7vg Sep 1, 2021

Package

GlobalNewFiles (MediaWiki Extension)

Affected versions

Before cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d

Patched versions

cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d

Description

Impact

The username column of the GlobalNewFiles special page is vulnerable to a stored XSS.

Patches

To be released

Workarounds

Disallow <,> (or other charecters required to insert html/js) from being used in account names so an XSS isn't possible.

References

https://phabricator.miraheze.org/T7935

For more information

If you have any questions or comments about this advisory:

Severity

Moderate

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
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
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:R/S:U/C:N/I:L/A:N

CVE ID

CVE-2021-39186

Weaknesses

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Learn more on MITRE.

Credits