CVE-2021-24856

Name: CVE-2021-24856
Creator: NVD / NIST
Published: 2021-11-17T11:15:08.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-24856 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. The Shared Files WordPress plugin before 1.6.61 does not sanitise and escape the Download Counter Text settings, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

The Shared Files WordPress plugin before 1.6.61 does not sanitise and escape the Download Counter Text settings, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.65%

46.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Tammersoft	Shared Files	< 1.6.61

References

https://mikadmin.fr/tech/XSS-Stored-Shared-Files-a837703ad010d111be11ffdf478aa6114F0lK656bV.pdfExploit, Third Party Advisory
https://wpscan.com/vulnerability/8fd483fb-d399-4b4f-b4ef-bbfad1b5cf1bExploit, Third Party Advisory
https://mikadmin.fr/tech/XSS-Stored-Shared-Files-a837703ad010d111be11ffdf478aa6114F0lK656bV.pdfExploit, Third Party Advisory
https://wpscan.com/vulnerability/8fd483fb-d399-4b4f-b4ef-bbfad1b5cf1bExploit, Third Party Advisory

Timeline

Published: Nov 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24856?

How severe is CVE-2021-24856?

CVE-2021-24856 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24856?

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-2021-24856?

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

Scan your code now

Source: NVD / NIST