CVE-2021-20111

Name: CVE-2021-20111
Creator: NVD / NIST
Published: 2021-07-30T14:15:14.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2021-20111 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A stored cross-site scripting vulnerability exists in TCExam <= 14.8.1. Valid files uploaded via tce_filemanager.php with a filename beggining with a period will be rendered as text/html. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

A stored cross-site scripting vulnerability exists in TCExam <= 14.8.1. Valid files uploaded via tce_filemanager.php with a filename beggining with a period will be rendered as text/html. An attacker with access to tce_filemanager.php could upload a malicious javascript payload which would be triggered when another user views the file.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.61%

44.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Tecnick	Tcexam	<= 14.8.1

References

https://www.tenable.com/security/research/tra-2021-32Exploit, Third Party Advisory
https://www.tenable.com/security/research/tra-2021-32Exploit, Third Party Advisory

Timeline

Published: Jul 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20111?

How severe is CVE-2021-20111?

CVE-2021-20111 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20111?

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-2021-20111?

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

Scan your code now

Source: NVD / NIST