Description

An XSS vulnerability in the popup-builder plugin before 3.64.1 for WordPress allows remote attackers to inject arbitrary JavaScript into existing popups via an unsecured ajax action in com/classes/Ajax.php. It is possible for an unauthenticated attacker to insert malicious JavaScript in several of the popup's fields by sending a request to wp-admin/admin-ajax.php with the POST action parameter of sgpb_autosave and including additional data in an allPopupData parameter, including the popup's ID (which is visible in the source of the page in which the popup is inserted) and arbitrary JavaScript which will then be executed in the browsers of visitors to that page. Because the plugin functionality automatically adds script tags to data entered into these fields, this injection will typically bypass most WAF applications.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  6.1 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  4.3 MEDIUM

Vector:  (AV:N/AC:M/Au:N/C:N/I:P/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://wpvulndb.com/vulnerabilities/10127	Third Party Advisory
https://www.wordfence.com/blog/2020/03/vulnerabilities-patched-in-popup-builder-plugin-affecting-over-100000-sites/	Exploit  Third Party Advisory

Weakness Enumeration

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

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 3/18/2020 12:49:36 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:sygnoos:popup-builder:*:*:*:*:*:wordpress:*:* versions up to (excluding) 3.64.1
Added	CVSS V2		NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Added	CWE		NIST CWE-79
Changed	Reference Type	https://wpvulndb.com/vulnerabilities/10127 No Types Assigned	https://wpvulndb.com/vulnerabilities/10127 Third Party Advisory
Changed	Reference Type	https://www.wordfence.com/blog/2020/03/vulnerabilities-patched-in-popup-builder-plugin-affecting-over-100000-sites/ No Types Assigned	https://www.wordfence.com/blog/2020/03/vulnerabilities-patched-in-popup-builder-plugin-affecting-over-100000-sites/ Exploit, Third Party Advisory