CVE-2021-33483

Name: CVE-2021-33483
Creator: NVD / NIST
Published: 2021-09-07T05:15:06.723+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2021-33483 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered in CommentsService.ashx in OnyakTech Comments Pro 3.8. The comment posting functionality allows an attacker to add an XSS payload to the JSON request that will execute when users visit the page with the comment.. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

An issue was discovered in CommentsService.ashx in OnyakTech Comments Pro 3.8. The comment posting functionality allows an attacker to add an XSS payload to the JSON request that will execute when users visit the page with the comment.

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

0.60%

44.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Onyaktech Comments Pro Project	Onyaktech Comments Pro	3.8

References

https://burninatorsec.blogspot.com/2021/07/onyaktech-comments-pro-broken.htmlExploit, Third Party Advisory
https://twitter.com/onyaktechThird Party Advisory
https://burninatorsec.blogspot.com/2021/07/onyaktech-comments-pro-broken.htmlExploit, Third Party Advisory
https://twitter.com/onyaktechThird Party Advisory

Timeline

Published: Sep 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33483?

How severe is CVE-2021-33483?

CVE-2021-33483 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33483?

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-2021-33483?

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

Scan your code now

Source: NVD / NIST