{"id":74721,"date":"2025-09-14T06:07:54","date_gmt":"2025-09-14T06:07:54","guid":{"rendered":""},"modified":"2025-10-25T05:20:24","modified_gmt":"2025-10-25T11:20:24","slug":"cve-2025-7425-critical-heap-corruption-vulnerability-in-libxslt","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7425-critical-heap-corruption-vulnerability-in-libxslt\/","title":{"rendered":"<strong>CVE-2025-7425: Critical Heap Corruption Vulnerability in libxslt<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has recently identified a serious flaw in libxslt, a prominent library used for parsing XSLT documents. This vulnerability, indexed as CVE-2025-7425, has the potential to compromise systems and lead to data leakage if left unaddressed. The flaw lies in the attribute type, or atype, flags, where <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8309-improper-privilege-management-vulnerability-in-manageengine-products\/\"  data-wpil-monitor-id=\"85085\">improper modification can corrupt internal memory management<\/a>. Given the widespread use of libxslt in various applications, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9250-critical-buffer-overflow-vulnerability-in-linksys-range-extenders\/\"  data-wpil-monitor-id=\"82382\">vulnerability could have significant implications for a wide range<\/a> of users, from individual consumers to large corporations. Addressing this issue is of paramount importance to maintaining the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-46916-critical-vulnerability-in-diebold-nixdorf-vynamic-security-suite-allows-system-compromise\/\"  data-wpil-monitor-id=\"86037\">security and integrity of systems<\/a> worldwide.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-7425<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9791-critical-vulnerability-in-tenda-ac20-16-03-08-05-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"84964\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2571926561\" 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>libxslt | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46715-kernel-pointer-vulnerability-in-sandboxie-versions-prior-to-1-15-12\/\"  data-wpil-monitor-id=\"82760\">versions prior<\/a> to patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49414-unrestricted-upload-of-file-with-dangerous-type-vulnerability-in-fw-gallery\/\"  data-wpil-monitor-id=\"91446\">vulnerability arises from a flaw within the attribute type<\/a> flag modification process in libxslt. When certain XSLT functions such as the key() process result in tree fragments, the corruption prevents the proper cleanup of ID attributes. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7775-critical-memory-overflow-vulnerability-in-netscaler-adc-and-gateway-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"83778\">leads to instances where the system may access freed memory<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-21125-serious-memory-corruption-vulnerability-leading-to-local-privilege-escalation\/\"  data-wpil-monitor-id=\"86036\">memory corruption<\/a> is detrimental as it can cause unexpected system crashes. Furthermore, a malicious attacker can exploit this flaw to trigger heap corruption, compromising the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82862\">system or leading to potential<\/a> data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1030792126\" 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>A conceptual example of how this vulnerability might be exploited is as follows:<\/p>\n<pre><code class=\"\" data-line=\"\">&lt;xsl:stylesheet version=&quot;1.0&quot; xmlns:xsl=&quot;http:\/\/www.w3.org\/1999\/XSL\/Transform&quot;&gt;\n&lt;xsl:key name=&quot;vulnkey&quot; match=&quot;doc&quot; use=&quot;.&quot;\/&gt;\n&lt;xsl:template match=&quot;\/&quot;&gt;\n&lt;xsl:variable name=&quot;treefrag&quot;&gt;\n&lt;doc\/&gt;\n&lt;\/xsl:variable&gt;\n&lt;xsl:apply-templates select=&quot;key(&#039;vulnkey&#039;, $treefrag)&quot;\/&gt;\n&lt;\/xsl:template&gt;\n&lt;\/xsl:stylesheet&gt;<\/code><\/pre>\n<p>This XSLT stylesheet creates a tree fragment that activates the flawed key() function, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22435-critical-memory-corruption-vulnerability-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"86273\">leading to heap corruption<\/a> as discussed above.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>The best mitigation for CVE-2025-7425 is to apply the patch provided by the vendor as soon as it is available. If the patch is not immediately available or cannot be applied promptly, temporary mitigation can be achieved by using a Web Application Firewall (WAF) or Intrusion Detection System (IDS). These systems can be configured to identify and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8418-arbitrary-plugin-installation-vulnerability-in-b-slider-gutenberg-slider-block-for-wp-plugin\/\"  data-wpil-monitor-id=\"82546\">block attempts to exploit this vulnerability<\/a>. However, these are interim solutions and the vendor&#8217;s patch should be applied as soon as possible to fully address this issue.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has recently identified a serious flaw in libxslt, a prominent library used for parsing XSLT documents. This vulnerability, indexed as CVE-2025-7425, has the potential to compromise systems and lead to data leakage if left unaddressed. The flaw lies in the attribute type, or atype, flags, where improper [&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-74721","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\/74721","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=74721"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/74721\/revisions"}],"predecessor-version":[{"id":84561,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/74721\/revisions\/84561"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=74721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=74721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=74721"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=74721"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=74721"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=74721"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=74721"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=74721"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=74721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}