PT-2021-4014 · Tcexam · Tcexam

Derrie Sutton · Published 2021-07-15 · Updated 2021-08-02 · CVE-2021-20111

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions TCExam versions prior to 14.8.2

Description A stored cross-site scripting issue exists, allowing an attacker to upload a malicious JavaScript payload via tce filemanager.php with a filename starting with a period. This payload would be triggered when another user views the file, potentially leading to cross-site scripting attacks. The vulnerability is related to the incorrect rendering of files starting with a period as text/html.

Recommendations For TCExam versions prior to 14.8.2, update to version 14.8.2 or later to resolve the issue. As a temporary workaround, consider restricting access to tce filemanager.php to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2021-04540

CVE-2021-20111

Affected Products

Tcexam

References · 5

• 🔥 https://tenable.com/security/research/tra-2021-32 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-20111 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20111 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04540 · Security Note
• https://github.com/tecnickcom/tcexam/commit/99ee2e02849c6285c5b9f18f31a1b5938d97191b · Note