A vulnerability classified as problematic has been found in eXo Chat Application (Chat Software). Affected is some unknown processing of the file application/src/main/webapp/vue-app/components/ExoChatMessageComposer.vue of the component Mention Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity.

The weakness was disclosed 02/05/2023 as 485. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2022-4902. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 3.3.0-20220417 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 26bf307d3658d1403cfd5c3ad423ce4c4d1cb2dc 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. A possible mitigation has been published even before and not after the disclosure of the vulnerability. The advisory contains the following remark:

Before this fix, when sending a message with a mention, there is an XSS issue
This commit encode html entities in the message before adding markup related to the mention so that, the malicious html is not evaluated

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Productinfo

Type

• Chat Software

Vendor

• eXo

Name

• Chat Application

License

• open-source

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CPE 2.2info

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