What is CVE-2021-4378?

CVE-2021-4378 is a medium-severity vulnerability in Labibahmed42 Wp Quick Frontend Editor – Wordpress Plugin, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-06-07.

How severe is CVE-2021-4378?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2021-4378 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Labibahmed42 Wp Quick Frontend Editor – Wordpress Plugin

CVE-2021-4378

The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 5.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with minimal permissions like subscribers, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Exploit)

Frequently asked questions

What is CVE-2021-4378?: CVE-2021-4378 is a medium-severity vulnerability in Labibahmed42 Wp Quick Frontend Editor – Wordpress Plugin, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2023-06-07.
How severe is CVE-2021-4378?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2021-4378 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.