PatchTheCVECVE-2021-24563: The Frontend Uploader WordPress plugin through 1.3.2 does not prevent HTML files from being uploaded via its f
CVE-2021-24563 is a medium-severity flaw (CVSS 6.1) affecting frontend uploader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Frontend Uploader WordPress plugin through 1.3.2 does not prevent HTML files from being uploaded via its form, allowing unauthenticated user to upload a malicious HTML file containing JavaScript for example, which will be triggered when someone access the file directly
Why this priority
- EPSS top 2%: very likely to be exploited
- 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 | 26.3% (top 2%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-10-11 |
| 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
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: WordPress Plugin Frontend Uploader 1.3.2 - Stored Cross Site Scripting (XSS) (Unauthenticated)
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-2021-24563?
frontend uploader: upgrade to newer than 1.3.2. Exact commands for each OS are on this page.
Is CVE-2021-24563 being exploited?
CVE-2021-24563 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-2021-24563 affect?
CVE-2021-24563 affects frontend uploader. Severity is medium (CVSS 6.1). The Frontend Uploader WordPress plugin through 1.3.2 does not prevent HTML files from being uploaded via its form, allowing unauthenticated user to upload a malicious HTML file containing JavaScript for example, which will be triggered when
How urgent is CVE-2021-24563?
Priority 51/100. EPSS top 2%: very likely to be exploited; Public exploit reference