What’s Vulnerable › Vulnerabilities

CVE-2021-26123

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-07 · updated 2026-06-17
• Weakness: CWE-79

Description

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

Affected products

• Livinglogic Xist4C: before 0.107.8 — fixed in 0.107.8

How to fix

Upgrade to a fixed version: Livinglogic Xist4C 0.107.8. Check the vendor advisory for mitigations.

References

• https://www.dgc.org/responsible_disclosure_20210421_livinglogic_xss
• https://www.xist4c.com
• https://www.dgc.org/responsible_disclosure_20210421_livinglogic_xss
• https://www.xist4c.com

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