CVE-2025-0640 Overview
CVE-2025-0640 is an Authorization Bypass Through User-Controlled Key vulnerability [CWE-639] affecting Akinsoft OctoCloud. The flaw allows an authenticated attacker to manipulate user-controlled identifiers in requests and access resources belonging to other users. Successful exploitation results in resource leak exposure, enabling disclosure and limited modification of data the attacker is not authorized to view or alter.
The vulnerability affects OctoCloud versions from s1.09.02 before v1.11.01. It was disclosed through Türkiye's national cybersecurity center (USOM) advisory TR-25-0203.
Critical Impact
Authenticated users can bypass authorization checks and access, modify, or affect availability of resources belonging to other tenants in OctoCloud.
Affected Products
- Akinsoft OctoCloud s1.09.02 through versions earlier than v1.11.01
- Deployments exposing OctoCloud functionality to networked clients
- Multi-tenant environments relying on OctoCloud for resource segregation
Discovery Timeline
- 2025-09-02 - CVE-2025-0640 published to NVD
- 2026-09-30 - Last updated in NVD database
Technical Details for CVE-2025-0640
Vulnerability Analysis
The vulnerability is categorized as an Insecure Direct Object Reference (IDOR) pattern under [CWE-639]. OctoCloud exposes operations that accept a user-supplied key, such as a resource identifier, without verifying that the authenticated requester owns or has rights to that resource. An attacker who already possesses valid credentials can substitute another user's identifier and the application returns or acts on that resource.
The impact spans the confidentiality, integrity, and availability of application resources at a limited level. Because the attack vector is network-based and requires only legitimate authentication, any user of a shared OctoCloud deployment can attempt horizontal privilege escalation against peers.
Root Cause
The root cause is missing or insufficient object-level authorization. OctoCloud trusts request parameters that identify a target resource without enforcing a server-side ownership check against the authenticated session. This design permits a user-controlled key to drive resource lookup and action execution.
Attack Vector
Exploitation requires network access to the OctoCloud application and valid authenticated credentials. The attacker intercepts or crafts a legitimate request, substitutes the resource identifier with one belonging to another account, and submits it. The server processes the request without validating that the requester is authorized for the referenced resource, returning data or executing the action against the targeted object.
No verified public proof-of-concept code is available for CVE-2025-0640. The vulnerability mechanism is described in prose above. See the USOM Notification TR-25-0203 for additional vendor details.
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Stop Identity AttacksDetection Methods for CVE-2025-0640
Indicators of Compromise
- Access logs showing a single authenticated session requesting resource identifiers across a wide numeric or UUID range
- HTTP responses returning data for resources that do not belong to the requesting account
- Spikes in 200 OK responses on resource-fetching endpoints combined with unusual identifier patterns
- Audit records that attribute actions to a user who does not own the modified resource
Detection Strategies
- Compare the authenticated principal in each request against the owner of the resource identified in the request parameters
- Baseline normal per-user resource access volume and alert on deviations consistent with enumeration
- Instrument the application to log authorization decisions, not only authentication events
Monitoring Recommendations
- Forward OctoCloud web and application logs to a centralized analytics platform for cross-session correlation
- Monitor for sequential or scripted identifier access patterns from a single session or source IP
- Review audit trails for actions where the acting user differs from the historical owner of the resource
How to Mitigate CVE-2025-0640
Immediate Actions Required
- Upgrade all OctoCloud instances to version v1.11.01 or later
- Inventory accounts with access to OctoCloud and rotate credentials for any account that showed anomalous access during the exposure window
- Restrict network reachability of the OctoCloud application to trusted sources until patched
- Review audit logs for cross-account access patterns since the earliest affected version was deployed
Patch Information
Akinsoft addressed the issue in OctoCloud v1.11.01. Administrators running any build from s1.09.02 up to but not including v1.11.01 must update. Refer to the Siber Güvenlik Notification TR-25-0203 for vendor-coordinated remediation guidance.
Workarounds
- Place OctoCloud behind an authenticating reverse proxy that enforces per-user access policies on resource endpoints
- Apply web application firewall rules that detect enumeration of sequential resource identifiers by a single session
- Reduce the number of privileged accounts and segment tenants onto separate OctoCloud instances where feasible
# Example WAF rate limiting on resource identifier endpoints
# Alert when a single session requests more than 50 distinct resource IDs per minute
SecRule REQUEST_URI "@rx /octocloud/resource/[0-9a-f-]+" \
"id:1000640,phase:1,pass,nolog,\
setvar:ip.resource_count=+1,\
expirevar:ip.resource_count=60"
SecRule IP:resource_count "@gt 50" \
"id:1000641,phase:1,deny,status:429,\
msg:'Possible IDOR enumeration against OctoCloud (CVE-2025-0640)'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
