CVE-2022-4821

Name: CVE-2022-4821
Creator: NVD / NIST
Published: 2022-12-28T21:15:10.84+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2022-4821 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability classified as problematic was found in FlatPress. This vulnerability affects the function onupload of the file admin/panels/uploader/admin.uploader.php of the component XML File Handler/MD File Handler. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

A vulnerability classified as problematic was found in FlatPress. This vulnerability affects the function onupload of the file admin/panels/uploader/admin.uploader.php of the component XML File Handler/MD File Handler. The manipulation leads to cross site scripting. The attack can be initiated remotely. The name of the patch is 3cc223dec5260e533a84b5cf5780d3a4fbf21241. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217000.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.51%

39.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Flatpress	Flatpress	All versions

References

https://github.com/flatpressblog/flatpress/commit/3cc223dec5260e533a84b5cf5780d3a4fbf21241Patch, Third Party Advisory
https://github.com/flatpressblog/flatpress/issues/178Issue Tracking, Patch, Third Party Advisory
https://vuldb.com/?ctiid.217000Third Party Advisory
https://vuldb.com/?id.217000Third Party Advisory
https://github.com/flatpressblog/flatpress/commit/3cc223dec5260e533a84b5cf5780d3a4fbf21241Patch, Third Party Advisory
https://github.com/flatpressblog/flatpress/issues/178Issue Tracking, Patch, Third Party Advisory
https://vuldb.com/?ctiid.217000Third Party Advisory
https://vuldb.com/?id.217000Third Party Advisory

Timeline

Published: Dec 28, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-4821?

How severe is CVE-2022-4821?

CVE-2022-4821 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2022-4821?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-4821?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST