{"id":2840,"date":"2025-12-15T18:31:09","date_gmt":"2025-12-15T18:31:09","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\/"},"modified":"2025-12-15T18:31:11","modified_gmt":"2025-12-15T18:31:11","slug":"modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\/","title":{"rendered":"Modula Image Gallery Arbitrary File Upload Vulnerability (CVE-2025-13646): High Severity"},"content":{"rendered":"<p>For WordPress website owners and administrators, staying vigilant about plugin security is paramount. Today, we&#8217;re highlighting a critical vulnerability found in the Modula Image Gallery plugin that could put your site at serious risk if not addressed. This flaw allows unauthorized file uploads, potentially giving attackers a backdoor into your system.<\/p>\n<h2>Understanding the Vulnerability<\/h2>\n<p>The Modula Image Gallery plugin, a popular choice for showcasing beautiful image galleries on WordPress sites, contained a serious security loophole. Specifically, a function named &#8216;ajax_unzip_file&#8217; lacked proper checks for the types of files being uploaded. This oversight meant that an authenticated attacker, even with just Author-level access, could upload malicious files. Using a clever technique known as a &#8220;race condition,&#8221; an attacker could bypass some security checks and place arbitrary files onto your server. In the worst-case scenario, this could lead to remote code execution, essentially allowing the attacker to run their own code on your website and take full control.<\/p>\n<h2>CVE Details<\/h2>\n<ul>\n<li><strong>Product:<\/strong> Modula Image Gallery plugin for WordPress<\/li>\n<li><strong>CVE ID:<\/strong> CVE-2025-13646<\/li>\n<li><strong>Published Date:<\/strong> December 3, 2025<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>This vulnerability specifically impacts the Modula Image Gallery plugin for WordPress. Users running the following versions are at risk:<\/p>\n<ul>\n<li>Modula Image Gallery versions 2.13.1 to 2.13.2 (inclusive)<\/li>\n<\/ul>\n<h2>Current Status<\/h2>\n<p>The vulnerability has been officially analyzed and assigned CVE-2025-13646. This means the details of the flaw are publicly known, making it crucial for affected users to take immediate action.<\/p>\n<h2>Severity Level<\/h2>\n<p>This arbitrary file upload vulnerability is rated with a <strong>High<\/strong> severity. The potential for remote code execution is what drives this high rating, as it can lead to complete compromise of your website, data theft, defacement, or further attacks on your server infrastructure.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>The good news is that the developers of the Modula Image Gallery plugin, WPChill, have addressed this vulnerability. The most effective solution is to update your plugin to a patched version immediately. While specific patch versions vary, generally, updating to the latest available version beyond 2.13.2 will include the necessary security fixes. These updates typically introduce robust file type validation within the &#8216;ajax_unzip_file&#8217; function, preventing malicious uploads.<\/p>\n<p>Always ensure your WordPress installation, themes, and all plugins are kept up-to-date. Regularly backing up your website is also a crucial security practice. For this specific issue, verify that your Modula Image Gallery plugin is updated to a version that contains the fix. If you cannot update immediately, consider temporarily restricting file upload capabilities for Author-level users and above, or deactivating the plugin until an update is possible.<\/p>\n<h2>References<\/h2>\n<ul>\n<li>https:\/\/plugins.trac.wordpress.org\/changeset\/3395701\/modula-best-grid-gallery#file5<\/li>\n<li>https:\/\/plugins.trac.wordpress.org\/changeset\/3407949\/modula-best-grid-gallery<\/li>\n<li>https:\/\/www.wordfence.com\/threat-intel\/vulnerabilities\/id\/59ee0ca2-846d-4ae8-ad19-7c3826861aeb?source=cve<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>For WordPress website owners and administrators, staying vigilant about plugin security is paramount. Today, we&#8217;re highlighting a critical vulnerability found in the Modula Image Gallery plugin that could<\/p>\n","protected":false},"author":17,"featured_media":2545,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[731,831,755,757,726],"class_list":["post-2840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-file-upload-vulnerability","tag-modula-image-gallery","tag-plugin-security","tag-remote-code-execution","tag-wordpress"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Modula Image Gallery Arbitrary File Upload - Ucartz | Ucartz<\/title>\n<meta name=\"description\" content=\"For WordPress website owners and administrators, staying vigilant about plugin security is paramount. 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Today, we&#039;re highlighting a critical vulnerability\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/updates\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\/\" \/>\n<meta property=\"og:site_name\" content=\"Ucartz Updates\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-15T18:31:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-15T18:31:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ucartz.com\/updates\/wp-content\/uploads\/2025\/12\/Wordpress-Banner.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"576\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Alex Joseph\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alex Joseph\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/\"},\"author\":{\"name\":\"Alex Joseph\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#\\\/schema\\\/person\\\/1ba9bfab02a76dee216c9f55bb634e56\"},\"headline\":\"Modula Image Gallery Arbitrary File Upload Vulnerability (CVE-2025-13646): High Severity\",\"datePublished\":\"2025-12-15T18:31:09+00:00\",\"dateModified\":\"2025-12-15T18:31:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/\"},\"wordCount\":464,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Wordpress-Banner.webp\",\"keywords\":[\"File Upload Vulnerability\",\"Modula Image Gallery\",\"Plugin Security\",\"Remote Code Execution\",\"WordPress\"],\"articleSection\":[\"Security\"],\"inLanguage\":\"en-US\"},{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/\",\"name\":\"| Ucartz Updates | Ucartz\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/modula-image-gallery-arbitrary-file-upload-vulnerability-cve-2025-13646-high-severity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Wordpress-Banner.webp\",\"datePublished\":\"2025-12-15T18:31:09+00:00\",\"dateModified\":\"2025-12-15T18:31:11+00:00\",\"description\":\"For WordPress website owners and administrators, staying vigilant about plugin security is paramount. 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