Stored cross-site scripting in Notification – Custom Notifications and Alerts for WordPress plugin

1) Stored cross-site scripting

EUVDB-ID: #VU57995

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-2021-39340

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

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 within several parameters in the ~/src/classes/Utils/Settings.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 updates from vendor's website.

Vulnerable software versions

Notification - Custom Notifications and Alerts for WordPress: 1.1.1 - 7.2.4

CPE2.3

• cpe:2.3:a:szaleq:notification:1.1.1:*:*:*:*:wordpress:*:*
• cpe:2.3:a:szaleq:notification:1.2:*:*:*:*:wordpress:*:*
• cpe:2.3:a:szaleq:notification:1.3:*:*:*:*:wordpress:*:*

External links

https://plugins.trac.wordpress.org/browser/notification/tags/7.2.4/src/classes/Utils/Settings.php#L167
https://github.com/BigTiger2020/word-press/blob/main/Notification.md
https://wordfence.com/vulnerability-advisories/#CVE-2021-39340

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.