What is CVE-2021-33371?

CVE-2021-33371 is a medium-severity vulnerability in Kabir-M-Alhasan Student Management System, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-07-28.

How severe is CVE-2021-33371?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Kabir-M-Alhasan Student Management System

CVE-2021-33371

A stored cross-site scripting (XSS) vulnerability in /nav_bar_action.php of Student Management System v1.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Chat box.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-07-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Kabir-M-Alhasan Student Management System — versions 1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.exploit-db.com/exploits/49865 (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33371?: CVE-2021-33371 is a medium-severity vulnerability in Kabir-M-Alhasan Student Management System, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-07-28.
How severe is CVE-2021-33371?: Medium severity. CVSS v3 base score is 5.4 out of 10.