#VU24800 Stored cross-site scripting in GistPress - CVE-2020-8498

Vulnerability identifier: #VU24800

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-8498

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GistPress
Web applications / Modules and components for CMS

Vendor: Brady Vercher

Description

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GistPress: 1.0.0 - 3.0.1

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External links
https://github.com/bradyvercher/gistpress/commit/e3f260edb6673227b0471c74b7ab13c094411ef7
https://github.com/bradyvercher/gistpress/releases/tag/v3.0.2
https://wpvulndb.com/vulnerabilities/10053/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.