{"id":74639,"date":"2025-09-13T21:05:08","date_gmt":"2025-09-13T21:05:08","guid":{"rendered":""},"modified":"2025-11-02T15:08:00","modified_gmt":"2025-11-02T21:08:00","slug":"cve-2025-58437-critical-vulnerability-in-coder-s-session-handling","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-58437-critical-vulnerability-in-coder-s-session-handling\/","title":{"rendered":"CVE-2025-58437: Critical Vulnerability in Coder\u2019s Session Handling<\/strong>"},"content":{"rendered":"

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

A significant cybersecurity vulnerability, CVE-2025-58437, has been detected in the platform Coder, which is widely used by organizations to provision remote development environments via Terraform. The vulnerability exists in versions 2.22.0 through 2.24.3, 2.25.0 and 2.25.1 of the software. This flaw exposes systems to potential<\/a> compromise and data leakage, thereby posing a serious threat to the security of users and organizations. Given the extent of Coder’s usage, this vulnerability is of substantial concern and demands immediate attention.<\/p>\n

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

CVE ID: CVE-2025-58437
\nSeverity: Critical, CVSS score 8.1
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: System compromise<\/a> or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Coder | 2.22.0 – 2.24.3
\nCoder | 2.25.0 – 2.25.1<\/p>\n

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

The vulnerability arises from insecure<\/a> session handling in Coder’s prebuilt workspaces. When a workspace is started, Coder generates a session token for the user, which is exposed via coder_workspace_owner.session_token. Prebuilt workspaces, owned by a built-in prebuilds system user, can be claimed by a different user. However, when a workspace is claimed, the previous session token for the prebuilds user is not expired, making it an exploitable vulnerability. Any Coder workspace templates that persist this automatically generated session token are potentially<\/a> impacted.<\/p>\n

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

Let’s illustrate this with a conceptual example. Suppose an attacker has somehow gained access to the prebuilds user’s<\/a> session token. The attacker could then use this token in the following way:<\/p>\n

GET \/coder_workspace\/ HTTP\/1.1\nHost: vulnerable-coder.com\nAuthorization: Bearer {prebuilds-user-session-token}\n{ \"workspace_id\": \"...\" }<\/code><\/pre>\n
In this example, the attacker uses the prebuilds user’s session token to gain unauthorized access<\/a> to the workspace data. This could potentially lead to data leakage or a system<\/a> compromise.
\nPlease remember, this is a conceptual example and not an actual exploit.<\/p>\n
Mitigation<\/strong><\/p>\n
The vulnerability is fixed in versions<\/a> 2.24.4 and 2.25.2 of Coder. Therefore, users are strongly recommended to update their software to these versions immediately. As a temporary mitigation measure, users can apply a vendor patch or use Web Application Firewall (WAF) and Intrusion Detection Systems (IDS). Still, the most secure solution is to update to the patched versions of the software.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A significant cybersecurity vulnerability, CVE-2025-58437, has been detected in the platform Coder, which is widely used by organizations to provision remote development environments via Terraform. The vulnerability exists in versions 2.22.0 through 2.24.3, 2.25.0 and 2.25.1 of the software. This flaw exposes systems to potential compromise and data leakage, thereby posing a serious threat […]<\/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":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-74639","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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