CVE-2020-26511

Name: CVE-2020-26511
Creator: NVD / NIST
Published: 2020-10-02T05:15:12.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2020-26511 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The wpo365-login plugin before v11.7 for WordPress allows use of a symmetric algorithm to decrypt a JWT token. This leads to authentication bypass.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

The wpo365-login plugin before v11.7 for WordPress allows use of a symmetric algorithm to decrypt a JWT token. This leads to authentication bypass.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.12%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Wpo365	Wordpress \+ Azure Ad \/ Microsoft Office 365	< 11.7

References

https://plugins.trac.wordpress.org/changeset/2388992/Patch, Third Party Advisory
https://wordpress.org/plugins/wpo365-login/#developersProduct, Third Party Advisory
https://wpvulndb.com/vulnerabilities/10418Third Party Advisory
https://www.wpo365.com/change-log/Release Notes, Vendor Advisory
https://plugins.trac.wordpress.org/changeset/2388992/Patch, Third Party Advisory
https://wordpress.org/plugins/wpo365-login/#developersProduct, Third Party Advisory
https://wpvulndb.com/vulnerabilities/10418Third Party Advisory
https://www.wpo365.com/change-log/Release Notes, Vendor Advisory

Timeline

Published: Oct 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26511?

The wpo365-login plugin before v11.7 for WordPress allows use of a symmetric algorithm to decrypt a JWT token. This leads to authentication bypass.

How severe is CVE-2020-26511?

CVE-2020-26511 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26511?

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-2020-26511?

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

Scan your code now

Source: NVD / NIST