Best Practical Solutions RT for Incident Response up to 5.0.10/6.0.3 HTML scrubber HTML injection

Summaryinfo

A vulnerability has been found in Best Practical Solutions RT for Incident Response up to 5.0.10/6.0.3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component HTML scrubber. This manipulation causes HTML injection. This vulnerability is tracked as CVE-2026-105456. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Best Practical Solutions RT for Incident Response up to 5.0.10/6.0.3 and classified as problematic. Affected by this vulnerability is an unknown part of the component HTML scrubber. The manipulation with an unknown input leads to a html injection vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

RTIR extends RT's HTML scrubber to allow an internal link placeholder, and the extension lets through any link that merely contains the placeholder, including links using the executable javascript: scheme. The change applies to the whole RT instance once RTIR is installed, not only to RTIR's own queues. Anyone who can add HTML content to a ticket on such an instance can store such a link. That includes an unauthenticated sender of HTML email to the Incident Reports queue, which RTIR opens to everyone by default. Script runs when a user clicks the link, in that user's session, and can act in RT with that user's authority. This issue was fixed in version 5.0.11 and 6.0.4

It is possible to read the advisory at cert.pl. This vulnerability is known as CVE-2026-105456 since 10/05/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 5.0.11 or 6.0.4 eliminates this vulnerability.

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Productinfo

Vendor

• Best Practical Solutions

Name

• RT for Incident Response

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.0.10
• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3

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CPE 2.2info

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