Vulnerability · Published Oct 19, 2021 · Assigned by Wordfence

CVE-2021-39343MPL-Publisher – Self-publish your book & ebook <= 1.30.2 Authenticated Stored Cross-Site Scripting

Medium 5.5

In plain English

A medium-severity cross-site scripting in MPL-Publisher from MPL-Publisher. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)1.0%top 35.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
MPL-Publisher	MPL-Publisher	1.30.2 – through 1.30.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

References

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