What’s Vulnerable › Vulnerabilities

CVE-2020-13758

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-06-01 · updated 2026-06-17
• Weakness: CWE-79

Description

modules/security/classes/general.post_filter.php/post_filter.php in the Web Application Firewall in Bitrix24 through 20.0.950 allows XSS by placing %00 before the payload.

Affected products

• Bitrix24: through 20.0.950

References

• https://blog.deteact.com/bitrix-waf-bypass/
• https://blog.deteact.com/bitrix-waf-bypass/

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