CVE-2021-39343

The MPL-Publisher WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/libs/PublisherController.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.30.2. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

CVSS v3 5.5 MEDIUM
CVSS v2.0 3.5 LOW

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:N/I:P/A:N

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/BigTiger2020/word-press/blob/main/MPL-Publisher.md	Exploit Third Party Advisory
https://plugins.trac.wordpress.org/browser/mpl-publisher/trunk/libs/PublisherController.php#L35	Exploit Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39343	Third Party Advisory
https://github.com/BigTiger2020/word-press/blob/main/MPL-Publisher.md	Exploit Third Party Advisory
https://plugins.trac.wordpress.org/browser/mpl-publisher/trunk/libs/PublisherController.php#L35	Exploit Third Party Advisory
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39343	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mpl-publisher:mpl-publisher:*:*:*:*:*:wordpress:*:*

History

25 Apr 2025, 19:11

Type	Values Removed	Values Added
First Time		Mpl-publisher mpl-publisher Mpl-publisher
CPE	cpe:2.3:a:mpl-publisher_project:mpl-publisher::::::wordpress::*	cpe:2.3:a:mpl-publisher:mpl-publisher::::::wordpress::*

Information

Published : 2021-10-19 15:15

Updated : 2025-04-25 19:11

NVD link : CVE-2021-39343

Mitre link : CVE-2021-39343

CVE.ORG link : CVE-2021-39343

JSON object : View

Products Affected

mpl-publisher

mpl-publisher

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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