SB2020013114 - Stored cross-site scripting in GistPress plugin for WordPress

Description

This security bulletin contains information about 1 security vulnerability.

1) Stored cross-site scripting (CVE-ID: CVE-2020-8498)

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

The vulnerability exists within the shortcode functionality due to insufficient sanitization of user-supplied data passed via the "id" parameter in the "includes/class-gistpress.php" file. A remote authenticated attacker can 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/bradyvercher/gistpress/commit/e3f260edb6673227b0471c74b7ab13c094411ef7
• https://github.com/bradyvercher/gistpress/releases/tag/v3.0.2
• https://wpvulndb.com/vulnerabilities/10053/