{"id":193145,"date":"2025-02-21T06:30:00","date_gmt":"2025-02-21T05:30:00","guid":{"rendered":"https:\/\/liora.io\/en\/?p=193145"},"modified":"2026-02-06T07:48:50","modified_gmt":"2026-02-06T06:48:50","slug":"all-about-broken-object-level-authorization","status":"publish","type":"post","link":"https:\/\/liora.io\/en\/all-about-broken-object-level-authorization","title":{"rendered":"What is Broken Object Level Authorization?"},"content":{"rendered":"<b>Application Programming Interfaces (APIs) are integral to the digital ecosystem, bridging the gap between services and applications, from online banking to smart devices. However, their widespread use makes them a prime target for cyberattacks.<\/b>\n\nWithout robust security measures, APIs are susceptible to numerous vulnerabilities, such as <b>BOLA (Broken Object Level Authorization)<\/b>. This article is designed to help you understand what <b>BOLA<\/b> is, how to identify it, and what strategies to employ to effectively secure your APIs against this threat.\n\n<style><br \/>\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style>\n<h3>What is a BOLA vulnerability?<\/h3>\n<b>Broken Object Level Authorization (BOLA)<\/b> is a severe security <b>vulnerability<\/b> that arises when <b>web applications or APIs<\/b> fail to properly verify whether a user is authorized to access specific data or resources.\n\nIn essence, the application allows a <b>user<\/b> to access or alter <b>sensitive information<\/b> simply by altering an identifier in the request. Consider an online medical record management service: each user can view their own records via a link with a unique identifier. If the system does not confirm that the user is indeed authorized to access the requested record, an attacker could modify this identifier to view other users&#8217; medical information.\n\n<b>The repercussions of such a flaw<\/b> can be catastrophic, leading to the leakage of personal data, theft of confidential information, or even malicious changes to critical resources.\n<h3>How does a BOLA vulnerability occur?<\/h3>\n<ul>\n \t<li><b>Lack of authorization verification: <\/b>The API fails to verify if the user has the permission to access a given resource.<\/li>\n \t<li><b>Identifier manipulation: <\/b>An attacker modifies an identifier in the request (e.g., in the URL or request body) to access data that is not theirs.<\/li>\n<\/ul>\n<b>Result: <\/b>The attacker can view, modify, or delete other users&#8217; sensitive data without restrictions.\n<h3>How to identify a BOLA vulnerability?<\/h3>\nVarious methods can be utilized to detect a <b>BOLA<\/b> vulnerability:\n<ul>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Identifier modification in requests:<\/b> Manually test by changing object identifiers in URLs or parameters to see if the API returns unauthorized data.<\/li>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Use of automated tools:<\/b> Tools like <a href=\"https:\/\/portswigger.net\/burp\">Burp Suite<\/a> (with the AuthMatrix or Autorize extensions) and <a href=\"_wp_link_placeholder\" data-wplink-edit=\"true\">OWASP ZAP<\/a> facilitate the automation of authorization testing and quickly uncover vulnerabilities.<\/li>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Observation of HTTP responses:<\/b> If the API returns a <b>200 (success)<\/b> code instead of a <b>403 (forbidden)<\/b> during an unauthorized attempt, it signals an access control issue.<\/li>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Code review:<\/b> Analyze server-side code to ensure permissions are consistently validated before a response is issued or an action authorized.<\/li>\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Tests on different user roles:<\/b> Simulate requests with varying access levels (standard user, administrator) to verify that permissions are applied correctly according to roles.<\/li>\n<\/ul>\n<style><br \/>\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-1.webp\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-1.webp 1000w, https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-1-300x200.webp 300w, https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-1-768x512.webp 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\">\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex is-content-justification-center\"><div class=\"wp-block-button \"><a class=\"wp-block-button__link wp-element-button \" href=\"\/en\/courses\/data-ai\/\">Discover our courses<\/a><\/div><\/div>\n\n<h3>What strategies to protect APIs against BOLA?<\/h3>\n<ol>\n \t<li><strong>Good API security practices<\/strong><\/li>\n<\/ol>\nThere are several solutions to secure APIs, such as API testing, to prevent vulnerabilities and safeguard your data at the source. For instance: Utilize random object identifiers that are difficult to guess to prevent giving attackers any clues.\n<ol start=\"2\">\n \t<li><strong>Authentication and session management<\/strong><\/li>\n<\/ol>\nProper management of authentication and sessions significantly reduces security risks. Authenticate users at each session and manage sessions appropriately, for example, by invalidating them after a period of inactivity.\n<ol start=\"3\">\n \t<li><strong>Strict access control<\/strong><\/li>\n<\/ol>\nAccess controls need to be meticulously implemented to ensure that only authorized users can access the data. Implement role-based access controls (RBAC) to restrict resource access based on user rights.\n<ol start=\"4\">\n \t<li><strong>Rate limiting<\/strong><\/li>\n<\/ol>\nRate limiting restricts the volume of requests an API can handle over a specified period. This measure prevents attackers from overwhelming the API with excessive requests, ensuring its performance and stability.\n<ol start=\"5\">\n \t<li><strong>Regular API security testing<\/strong><\/li>\n<\/ol>\nComprehensive API security testing helps identify various vulnerabilities before they can be exploited. Conducting regular security tests enables a deeper understanding of potential risks, the detection of flaws, and the implementation of necessary actions to promptly address them.\n\n<img decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-2.webp\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-2.webp 1000w, https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-2-300x200.webp 300w, https:\/\/liora.io\/app\/uploads\/sites\/9\/2025\/01\/broken-object-level-authorization-Liora-2-768x512.webp 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\">\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex is-content-justification-center\"><div class=\"wp-block-button \"><a class=\"wp-block-button__link wp-element-button \" href=\"\/en\/courses\/data-ai\/\">Find a course for you<\/a><\/div><\/div>\n\n<h3>Conclusion<\/h3>\n<b>The BOLA vulnerability<\/b> highlights the risks associated with inadequate <b>authorization management<\/b>, which can expose sensitive data and compromise <b>application security<\/b>. By understanding how this flaw arises and implementing stringent <b>access control<\/b> practices, you can effectively thwart this type of attack and bolster API protection.","protected":false},"excerpt":{"rendered":"<p>Application Programming Interfaces (APIs) are integral to the digital ecosystem, bridging the gap between services and applications, from online banking to smart devices. However, their widespread use makes them a prime target for cyberattacks. Without robust security measures, APIs are susceptible to numerous vulnerabilities, such as BOLA (Broken Object Level Authorization). This article is designed [&hellip;]<\/p>\n","protected":false},"author":74,"featured_media":193147,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"editor_notices":[],"footnotes":""},"categories":[2426],"class_list":["post-193145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity"],"acf":[],"_links":{"self":[{"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/posts\/193145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/users\/74"}],"replies":[{"embeddable":true,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/comments?post=193145"}],"version-history":[{"count":5,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/posts\/193145\/revisions"}],"predecessor-version":[{"id":205596,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/posts\/193145\/revisions\/205596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/media\/193147"}],"wp:attachment":[{"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/media?parent=193145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/liora.io\/en\/wp-json\/wp\/v2\/categories?post=193145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}