SB2021090307 - Stored cross-site scripting in Miraheze GlobalNewFiles

Description

This security bulletin contains information about 1 security vulnerability.

1) Stored cross-site scripting (CVE-ID: CVE-2021-39186)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "username" column of the GlobalNewFiles special page. A remote attacker can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg
• https://phabricator.miraheze.org/T7935
• https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d