Improper Verification of Cryptographic Signature in WordPress + Microsoft Office 365 plugin for WordPress

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU47268

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26511

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected plugin does not correctly verify JWT signatures. A remote attacker can forge tokens and bypass authentication and authorisation checks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WordPress + Office 365 login: 7.4 - 11.6

External links

http://wpvulndb.com/vulnerabilities/10418/
http://www.wpo365.com/change-log/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.