Vulnerability identifier: #VU54577

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26037

CWE-ID: CWE-613

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Joomla!
Web applications / CMS

Vendor: Joomla!

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient session expiration issue when changing user's password or blocking the user accont. A remote non-authenticated attacker can obtain or guess session token and gain unauthorized access to session that belongs to another user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Joomla!: 3.9.0 - 3.9.27, 3.8.0 - 3.8.13, 3.7.0 - 3.7.5, 3.6.0 - 3.6.5, 3.5.0 - 3.5.9, 3.0.0 - 3.0.4, 3.3.0 - 3.3.6, 3.2.0 - 3.2.7, 3.4.0 - 3.4.8, 3.1.0 - 3.1.6, 2.5.0 - 2.5.28

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External links
http://developer.joomla.org/security-centre/858-20210703-core-lack-of-enforced-session-termination.html

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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.