CVE-2021-4302

Name: CVE-2021-4302
Creator: NVD / NIST
Published: 2023-01-04T22:15:09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2021-4302 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability was found in slackero phpwcms up to 1.9.26. It has been classified as problematic. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

A vulnerability was found in slackero phpwcms up to 1.9.26. It has been classified as problematic. This affects an unknown part of the component SVG File Handler. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. Upgrading to version 1.9.27 is able to address this issue. The patch is named b39db9c7ad3800f319195ff0e26a0981395b1c54. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-217419.

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

0.53%

40.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Phpwcms	Phpwcms	< 1.9.27

References

https://github.com/slackero/phpwcms/commit/b39db9c7ad3800f319195ff0e26a0981395b1c54Patch
https://github.com/slackero/phpwcms/releases/tag/v1.9.27Release Notes
https://vuldb.com/?ctiid.217419Permissions Required, Third Party Advisory
https://vuldb.com/?id.217419Permissions Required, Third Party Advisory
https://github.com/slackero/phpwcms/commit/b39db9c7ad3800f319195ff0e26a0981395b1c54Patch
https://github.com/slackero/phpwcms/releases/tag/v1.9.27Release Notes
https://vuldb.com/?ctiid.217419Permissions Required, Third Party Advisory
https://vuldb.com/?id.217419Permissions Required, Third Party Advisory

Timeline

Published: Jan 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4302?

How severe is CVE-2021-4302?

CVE-2021-4302 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4302?

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-2021-4302?

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

Scan your code now

Source: NVD / NIST