CVE-2021-3131

Name: CVE-2021-3131
Creator: NVD / NIST
Published: 2021-01-13T16:15:14.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.95%

Last modified Jun 17, 2026

CVE-2021-3131 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The Web server in 1C:Enterprise 8 before 8.3.17.1851 sends base64 encoded credentials in the creds URL parameter.. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.95%

56.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-326

Affected Software

Vendor	Product	Versions
1c	1c\	>= 8.0, < 8.3.17.1851

References

https://github.com/jet-pentest/CVE-2021-3131Third Party Advisory
https://github.com/jet-pentest/CVE-2021-3131Third Party Advisory

Timeline

Published: Jan 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3131?

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

How severe is CVE-2021-3131?

CVE-2021-3131 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3131?

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-2021-3131?

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

Scan your code now

Source: NVD / NIST