```json { "x": "🚨 HIGH: CVE-2026-25524 (CVSS 8.1)\nOpenMage LTS vulnerable to phar deserialization leading to RCE via malicious image uploads. Affects versions <20.17.0.\nUpgrade to 20.17.0 immediately.\n#CVE #Vulnerability #PatchNow #ThreatIntel", "linkedin": "🚨 HIGH SEVERITY ALERT\n\nCVE-2026-25524: OpenMage LTS Phar Deserialization Vulnerability\n\nCVSS Score: 8.1 (High)\nVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\n\nTHREAT SUMMARY:\nOpenMage LTS (Magento Long Term Support), a community-driven alternative to Magento Community Edition, contains a critical deserialization vulnerability that enables remote code execution.\n\nKEY DETAILS:\n• Affected Product: OpenMage LTS versions prior to 20.17.0\n• Vulnerability: PHP phar:// stream wrapper deserialization (CWE-502)\n• Attack Vector: Malicious phar files disguised as images\n• Functions Affected: getimagesize(), file_exists(), is_readable()\n• Impact: Arbitrary code execution with high confidentiality, integrity, and availability impact\n\nATTACK SCENARIO:\nAttackers can upload malicious phar files disguised as legitimate images. When OpenMage processes these files using vulnerable PHP functions with phar:// paths during image validation or media handling, deserialization occurs, leading to remote code execution.\n\nMITIGATION:\n✅ Upgrade to OpenMage LTS version 20.17.0 immediately\n✅ Review and restrict file upload capabilities\n✅ Implement strict file type validation\n✅ Monitor for suspicious phar:// stream wrapper usage in logs\n\nSOC teams should prioritize patching e-commerce platforms running OpenMage LTS and conduct retrospective analysis of uploaded media files.\n\n#CVE #Vulnerability #PatchNow #ThreatIntel #DFIR #CyberSecurity", "reddit": "**HIGH SEVERITY: CVE-2026-25524 - OpenMage LTS Phar Deserialization RCE**\n\n**CVSS Score:** 8.1 (High)\n**Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\n**CWE:** CWE-502 (Deserialization of Untrusted Data)\n**Patched Version:** 20.17.0\n\n---\n\n**VULNERABILITY OVERVIEW**\n\nOpenMage LTS (Magento Long Term Support), an unofficial community-driven fork of Magento Community Edition, contains a critical vulnerability allowing remote code execution through phar deserialization. The vulnerability exists in versions prior to 20.17.0.\n\n**TECHNICAL DETAILS**\n\nThe vulnerability stems from improper handling of the phar:// stream wrapper in PHP. OpenMage LTS uses several native PHP functions during image validation and media handling operations:\n\n- getimagesize()\n- file_exists()\n- is_readable()\n\nWhen these functions process file paths containing the phar:// stream wrapper, PHP automatically deserializes metadata from phar archives. This behavior can be exploited if an attacker controls the file path parameter.\n\n**ATTACK CHAIN**\n\n1. Attacker crafts a malicious phar archive containing a serialized PHP object with magic methods (__destruct, __wakeup, etc.)\n2. Phar file is disguised as a legitimate image format (JPEG, PNG, etc.) to bypass basic file type checks\n3. Attacker uploads the malicious file through OpenMage's media upload functionality\n4. When OpenMage processes the uploaded file using vulnerable functions with a phar:// path, deserialization is triggered\n5.
Post summary
The post primarily urges users to apply the patch (upgrade to OpenMage LTS 20.17.0) after detailing the RCE vulnerability and mitigation steps.
