Vulnerability identifier: #VU553

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description
The vulnerability allows a remote user to mail out unpublished comments.
The weakness is caused by access control error. During the hook_comments API operation the system doesn't check the comments status that enables it's publication.
Successful vulnerability results in unallowed comments publication.

Mitigation
Update 4.7.x to 4.7.8.
http://ftp.drupal.org/files/projects/drupal-4.7.8.tar.gz
Update 5.x to 5.3.
http://ftp.drupal.org/files/projects/drupal-5.3.tar.gz

Vulnerable software versions

Drupal: 4.7.0 - 4.7.7, 5.0 - 5.2

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External links
http://www.drupal.org/node/184354

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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.