Concrete CMS up to 8.5.18/9.3.3 Image Editor Background Color cross site scripting

Summaryinfo

A vulnerability was found in Concrete CMS up to 8.5.18/9.3.3. It has been classified as problematic. Impacted is an unknown function of the component Image Editor Background Color. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2024-8291. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Concrete CMS up to 8.5.18/9.3.3 and classified as problematic. Affected by this vulnerability is an unknown code block of the component Image Editor Background Color. The manipulation with an unknown input leads to a cross site scripting 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:

Concrete CMS versions 9.0.0 to 9.3.3 and below 8.5.19 are vulnerable to Stored XSS in Image Editor Background Color.  A rogue admin could add malicious code to the Thumbnails/Add-Type. The Concrete CMS Security Team gave this a CVSS v4 score of 2.1 with vector CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N  Thanks,  Alexey Solovyev for reporting.

The weakness was disclosed by Alexey Solovyev. The advisory is shared at github.com. This vulnerability is known as CVE-2024-8291 since 08/28/2024. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 8.5.19 or 9.3.4 eliminates this vulnerability. The upgrade is hosted for download at documentation.concretecms.org. Applying the patch dbce253166f6b10ff3e0c09e50fd395370b8b065 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Content Management System

Vendor

• Concrete

Name

• CMS

Version

• 8.5.0
• 8.5.1
• 8.5.2
• 8.5.3
• 8.5.4
• 8.5.5
• 8.5.6
• 8.5.7
• 8.5.8
• 8.5.9
• 8.5.10
• 8.5.11
• 8.5.12
• 8.5.13
• 8.5.14
• 8.5.15
• 8.5.16
• 8.5.17
• 8.5.18
• 9.3.0
• 9.3.1
• 9.3.2
• 9.3.3

License

• open-source

CPE 2.3info

• 🔍
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CPE 2.2info

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