CVE-2021-20112: XSS
A stored cross-site scripting vulnerability exists in TCExam <= 14.8.1. Valid files uploaded via tceselectmediafile.php with a filename beggining with a period will be rendered as text/html. An attacker with access to tceselectmediafile.php could upload a malicious javascript payload which would be triggered when another user views the file.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability CVE-2021-20112?
The vulnerability CVE-2021-20112 is a stored cross-site scripting vulnerability in TCExam <= 14.8.1.
How does the vulnerability CVE-2021-20112 work?
The vulnerability CVE-2021-20112 allows an attacker to upload a malicious JavaScript payload via tce_select_mediafile.php with a file name beginning with a period, which will be rendered as text/html and executed when accessed by a victim.
What is the severity of the vulnerability CVE-2021-20112?
The severity of the vulnerability CVE-2021-20112 is medium with a CVSS score of 5.4.
Which software versions are affected by CVE-2021-20112?
The TCExam versions up to and inclusive of 14.8.1 are affected by CVE-2021-20112.
How can the vulnerability CVE-2021-20112 be fixed?
To fix the vulnerability CVE-2021-20112, it is recommended to update TCExam to a version higher than 14.8.1.