What’s Vulnerable › Vulnerabilities

CVE-2021-3131

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-13 · updated 2026-06-17
• Weakness: CWE-326

Description

The Web server in 1C:Enterprise 8 before 8.3.17.1851 sends base64 encoded credentials in the creds URL parameter.

Affected products

• 1C:Enterprise: from 8.0 before 8.3.17.1851 — fixed in 8.3.17.1851

How to fix

Upgrade to a fixed version: 1C:Enterprise 8.3.17.1851. Check the vendor advisory for mitigations.

References

• https://github.com/jet-pentest/CVE-2021-3131
• https://github.com/jet-pentest/CVE-2021-3131

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