CVE-2023-39543

Name: CVE-2023-39543
Creator: NVD / NIST
Published: 2023-08-21T09:15:09.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2023-39543 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross-site scripting vulnerability in LuxCal Web Calendar prior to 5.2.3M (MySQL version) and LuxCal Web Calendar prior to 5.2.3L (SQLite version) allows a remote unauthenticated attacker to execute an arbitrary script on the web browser of the user who is using the product.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Cross-site scripting vulnerability in LuxCal Web Calendar prior to 5.2.3M (MySQL version) and LuxCal Web Calendar prior to 5.2.3L (SQLite version) allows a remote unauthenticated attacker to execute an arbitrary script on the web browser of the user who is using the product.

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

0.53%

40.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Luxsoft	Luxcal Web Calendar	< 5.2.3m
Luxsoft	Luxcal Web Calendar	< 5.2.3l

References

https://jvn.jp/en/jp/JVN04876736/Third Party Advisory
https://www.luxsoft.eu/Product
https://www.luxsoft.eu/?downloadProduct
https://jvn.jp/en/jp/JVN04876736/Third Party Advisory
https://www.luxsoft.eu/Product
https://www.luxsoft.eu/?downloadProduct

Timeline

Published: Aug 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39543?

How severe is CVE-2023-39543?

CVE-2023-39543 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39543?

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-2023-39543?

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

Scan your code now

Source: NVD / NIST