PatchTheCVECVE-2021-4363: The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions
CVE-2021-4363 is a medium-severity flaw (CVSS 6.1) affecting wp quick frontend editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 5.5 due to insufficient input sanitization and output escaping on the 'save_content_front' function that uses print_r on the user-supplied $_REQUEST values . This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.7% (top 45%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2023-06-07 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-4363?
wp quick frontend editor: upgrade to newer than 5.5. Exact commands for each OS are on this page.
Is CVE-2021-4363 being exploited?
CVE-2021-4363 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-4363 affect?
CVE-2021-4363 affects wp quick frontend editor. Severity is medium (CVSS 6.1). The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 5.5 due to insufficient input sanitization and output escaping on the 'save_content_front' function that use
How urgent is CVE-2021-4363?
Priority 40/100. Public exploit reference
Software pages
Related CVEs
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- CVE-2021-4378 MEDIUM 6.4 UPGRADE The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up
- CVE-2021-4371 MEDIUM 4.3 UPGRADE The WP Quick FrontEnd Editor plugin for WordPress is vulnerable to Setting Changs in versions up to, and inclu