CVE-2021-3309

Name: CVE-2021-3309
Creator: NVD / NIST
Published: 2021-01-26T21:15:13.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.70%

Last modified Jun 17, 2026

CVE-2021-3309 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. packages/wekan-ldap/server/ldap.js in Wekan before 4.87 can process connections even though they are not authorized by the Certification Authority trust store,. EPSS estimates a 1.70% chance of exploitation in the next 30 days.

Description

packages/wekan-ldap/server/ldap.js in Wekan before 4.87 can process connections even though they are not authorized by the Certification Authority trust store,

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

1.70%

74.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Wekan Project	Wekan	< 4.87

References

https://github.com/wekan/wekan/issues/3482Exploit, Issue Tracking, Third Party Advisory
https://github.com/wekan/wekan/pull/3483/commits/31f89121fecca5a761b05cc3a26d4f237e90b484Patch, Third Party Advisory
https://github.com/wekan/wekan/releases/tag/v4.87Release Notes, Third Party Advisory
https://github.com/wekan/wekan/issues/3482Exploit, Issue Tracking, Third Party Advisory
https://github.com/wekan/wekan/pull/3483/commits/31f89121fecca5a761b05cc3a26d4f237e90b484Patch, Third Party Advisory
https://github.com/wekan/wekan/releases/tag/v4.87Release Notes, Third Party Advisory

Timeline

Published: Jan 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3309?

packages/wekan-ldap/server/ldap.js in Wekan before 4.87 can process connections even though they are not authorized by the Certification Authority trust store,

How severe is CVE-2021-3309?

CVE-2021-3309 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3309?

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-2021-3309?

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

Scan your code now

Source: NVD / NIST