CVE-2020-21052

Name: CVE-2020-21052
Creator: NVD / NIST
Published: 2023-06-20T15:15:10.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2020-21052 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross Site Scripting vulnerability in zrlog zrlog v.2.1.3 allows a remote attacker to execute arbitrary code via the nickame parameter of the /post/addComment function.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

Cross Site Scripting vulnerability in zrlog zrlog v.2.1.3 allows a remote attacker to execute arbitrary code via the nickame parameter of the /post/addComment function.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.55%

41.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zrlog	Zrlog	2.1.3

References

https://github.com/94fzb/zrlog/issues/56Exploit, Issue Tracking
https://github.com/94fzb/zrlog/issues/56Exploit, Issue Tracking

Timeline

Published: Jun 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21052?

Cross Site Scripting vulnerability in zrlog zrlog v.2.1.3 allows a remote attacker to execute arbitrary code via the nickame parameter of the /post/addComment function.

How severe is CVE-2020-21052?

CVE-2020-21052 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21052?

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-2020-21052?

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

Scan your code now

Source: NVD / NIST