{"id":38308,"date":"2025-05-15T08:57:18","date_gmt":"2025-05-15T08:57:18","guid":{"rendered":""},"modified":"2025-09-29T02:50:28","modified_gmt":"2025-09-29T08:50:28","slug":"cve-2025-29813-authentication-bypass-vulnerability-in-azure-devops","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29813-authentication-bypass-vulnerability-in-azure-devops\/","title":{"rendered":"CVE-2025-29813: Authentication Bypass Vulnerability in Azure DevOps<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The vulnerability titled CVE-2025-29813 pertains to Azure DevOps, a suite of development tools, services, and features provided by Microsoft. This vulnerability is significant due to the potential for an unauthorized attacker to bypass authentication by exploiting assumed-immutable data, thus leading to a possible escalation of privileges over a network. Given the widespread use of Azure DevOps, the impact of this vulnerability is far-reaching, potentially affecting numerous organizations and systems<\/a> worldwide.
\nThe seriousness of this vulnerability is underscored by its CVSS Severity<\/a> Score of 10.0, denoting the highest level of severity. The implications of a successful exploit could result in system compromise or data<\/a> leakage, posing a significant risk to system integrity and data confidentiality.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-29813
\nSeverity: Critical (10.0)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise<\/a> or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Azure DevOps | All versions prior<\/a> to patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by leveraging a flaw<\/a> in the authentication process of Azure DevOps. The flaw lies in the handling of data<\/a> assumed to be immutable during the authentication process. An unauthorized attacker can manipulate this data to spoof identity claims, thus bypassing the authentication<\/a> mechanism. This can lead to an elevation of privileges over a network, providing unauthorized access to resources and potentially compromising the system or leading<\/a> to data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of how the vulnerability might be exploited. This example showcases a malicious HTTP request<\/a>, which could be used to manipulate the assumed-immutable data:<\/p>\n

POST \/vulnerable\/authentication\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"immutable_data\": \"Spoofed_identity_claim\" }<\/code><\/pre>\n
In this example, “immutable_data” is the assumed-immutable data that the authentication mechanism relies on, and “Spoofed_identity_claim” is the manipulated data that the attacker uses to bypass authentication<\/a>.<\/p>\n
Mitigations<\/strong><\/p>\n
Users are advised to apply the vendor patch as soon as possible to mitigate this vulnerability<\/a>. Until the patch can be applied, users should consider implementing a Web<\/a> Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These systems can help detect and prevent unauthorized access attempts, thus minimizing the potential impact of the vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability titled CVE-2025-29813 pertains to Azure DevOps, a suite of development tools, services, and features provided by Microsoft. This vulnerability is significant due to the potential for an unauthorized attacker to bypass authentication by exploiting assumed-immutable data, thus leading to a possible escalation of privileges over a network. Given the widespread use of […]<\/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,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[75],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-38308","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-authentication-bypass"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t