CVE-2021-26123

Name: CVE-2021-26123
Creator: NVD / NIST
Published: 2021-05-07T12:15:07.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2021-26123 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. LivingLogic XIST4C before 0.107.8 allows XSS via login.htm, login.wihtm, or login-form.htm.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

LivingLogic XIST4C before 0.107.8 allows XSS via login.htm, login.wihtm, or login-form.htm.

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

0.67%

47.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Livinglogic	Xist4c	< 0.107.8

References

https://www.dgc.org/responsible_disclosure_20210421_livinglogic_xssExploit, Third Party Advisory
https://www.xist4c.comProduct
https://www.dgc.org/responsible_disclosure_20210421_livinglogic_xssExploit, Third Party Advisory
https://www.xist4c.comProduct

Timeline

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

Frequently Asked Questions

What is CVE-2021-26123?

LivingLogic XIST4C before 0.107.8 allows XSS via login.htm, login.wihtm, or login-form.htm.

How severe is CVE-2021-26123?

CVE-2021-26123 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26123?

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-2021-26123?

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

Scan your code now

Source: NVD / NIST