CVE-2021-35233

Name: CVE-2021-35233
Creator: NVD / NIST
Published: 2021-10-27T01:15:07.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2021-35233 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. The HTTP TRACK & TRACE methods were enabled in Kiwi Syslog Server 9.7.1 and earlier. These methods are intended for diagnostic purposes only. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

The HTTP TRACK & TRACE methods were enabled in Kiwi Syslog Server 9.7.1 and earlier. These methods are intended for diagnostic purposes only. If enabled, the web server will respond to requests that use these methods by returning exact HTTP request that was received in the response to the client. This may lead to the disclosure of sensitive information such as internal authentication headers appended by reverse proxies.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.93%

56.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-16

Affected Software

Vendor	Product	Versions
Solarwinds	Kiwi Syslog Server	<= 9.7.2

References

https://documentation.solarwinds.com/en/success_center/kss/content/release_notes/kss_9-8_release_notes.htmRelease Notes, Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35233Release Notes, Vendor Advisory
https://documentation.solarwinds.com/en/success_center/kss/content/release_notes/kss_9-8_release_notes.htmRelease Notes, Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/CVE-2021-35233Release Notes, Vendor Advisory

Timeline

Published: Oct 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35233?

How severe is CVE-2021-35233?

CVE-2021-35233 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35233?

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-2021-35233?

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

Scan your code now

Source: NVD / NIST