Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2023-5917
CVE-2023-5917:
PHP vulnerability analysis and mitigation
Overview
A cross-site scripting (XSS) vulnerability was discovered in phpBB versions up to 3.3.10. The vulnerability affects the main function in phpBB/includes/acp/acp_icons.php, specifically in the Smiley Pack Handler component. The issue was disclosed in October 2023 and was fixed in phpBB version 3.3.11 (PHPBB Release, NVD).
Technical details
The vulnerability stems from improper handling of the 'pak' argument in the Smiley Pack Handler component. The CVSS v3.1 base score is 6.1 (Medium), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. The issue allows for cross-site scripting through manipulation of smiley pack files in the ACP. The fix involved adding safeguards against JavaScript code injection via smiley packs and escaping smilies URLs (NVD, PHPBB Patch).
Impact
The vulnerability could allow remote attackers to inject arbitrary web script or HTML through the smiley pack handler functionality. This could potentially lead to the execution of unauthorized JavaScript code in the context of other users' browsers (NVD).
Mitigation and workarounds
The vulnerability was fixed in phpBB version 3.3.11. Users are advised to upgrade to this version or later. The patch (ccf6e6c255d38692d72fcb613b113e6eaa240aac) implements proper escaping of smilies URLs and prevents path manipulation in .pak filenames (PHPBB Release, PHPBB Patch).
Community reactions
The phpBB team acknowledged the security researcher shin24 who reported this issue through HackerOne. The vulnerability was addressed as part of the security hardening measures in the 3.3.11 release (PHPBB Release).
Additional resources
Source: This report was generated using AI
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