What is CVE-2021-33966?

CVE-2021-33966 is a medium-severity vulnerability in Spotweb Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-01-21.

How severe is CVE-2021-33966?

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

XSS in Spotweb Project

CVE-2021-33966

Cross site scripting (XSS) vulnerability in spotweb 1.4.9, allows authenticated attackers to execute arbitrary code via crafted GET request to the login page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-21 · 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: 0.009 (57.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Spotweb Project — versions 1.4.9

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/162731/Spotweb-Develop-1.4.9-Cross-Site-Scripting… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33966?: CVE-2021-33966 is a medium-severity vulnerability in Spotweb Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-01-21.
How severe is CVE-2021-33966?: Medium severity. CVSS v3 base score is 5.4 out of 10.