CVE-2025-30756: Oracle REST Data Services Auth Bypass Flaw

CVE-2025-30756 Overview

CVE-2025-30756 affects Oracle REST Data Services (ORDS) version 24.2.0. The flaw allows an unauthenticated attacker with network access via HTTP to compromise the service through Cross-Site Request Forgery [CWE-352]. Exploitation requires user interaction from a person other than the attacker, typically by tricking an authenticated user into visiting a malicious page.

Successful attacks produce a scope change and can impact additional products beyond ORDS itself. Attackers gain unauthorized update, insert, or delete access to a subset of ORDS-accessible data, along with unauthorized read access to a subset of that data.

Critical Impact
A successful CSRF attack lets an unauthenticated remote attacker modify and read a subset of Oracle REST Data Services data with scope-changing consequences for connected products.

Affected Products

Oracle REST Data Services 24.2.0
Applications and databases exposed through affected ORDS deployments
Downstream Oracle products reachable via ORDS endpoints (scope change)

Discovery Timeline

2025-07-15 - CVE-2025-30756 published to NVD
2025-07-15 - Oracle publishes Critical Patch Update advisory
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-30756

Vulnerability Analysis

Oracle REST Data Services exposes REST endpoints for Oracle Database objects and PL/SQL. The vulnerability is a Cross-Site Request Forgery weakness in the General component of ORDS 24.2.0. State-changing HTTP requests are accepted without sufficient verification that the request was intentionally issued by the authenticated user.

An attacker crafts a malicious web page or email containing HTTP requests targeting an ORDS endpoint. When a victim with an active ORDS session visits the attacker-controlled content, the browser transmits the request along with the victim's session credentials. ORDS processes the forged request as if the authenticated user initiated it.

The scope change indicator in the CVSS vector reflects that consequences reach beyond ORDS itself. Because ORDS proxies operations to backend Oracle Database resources, forged requests can alter data owned or accessed by the victim across connected systems.

Root Cause

The underlying weakness is missing or insufficient anti-CSRF protection on state-changing endpoints. ORDS did not adequately validate origin, referer, or synchronizer token values before honoring authenticated write operations, allowing cross-origin requests carrying session cookies to succeed.

Attack Vector

Exploitation proceeds over the network via HTTP and requires user interaction. The attacker lures an authenticated ORDS user to a malicious page. That page issues background HTTP requests (form submissions, fetch, or image tags) to the ORDS endpoint. The victim's browser attaches session cookies, and ORDS executes the forged operation. No credentials are needed by the attacker directly, which is why the required privilege level is none.

See the Oracle Security Alert July 2025 for the vendor's technical description.

Detection Methods for CVE-2025-30756

Indicators of Compromise

ORDS write operations (POST, PUT, PATCH, DELETE) with Referer or Origin headers pointing to unexpected external domains.
Unexpected data modification events in ORDS-managed schemas that correlate with user web browsing timestamps.
HTTP requests to ORDS endpoints lacking a valid anti-CSRF token or synchronizer value.

Detection Strategies

Enable verbose ORDS access logging and forward it to a centralized log platform for correlation with browser and proxy telemetry.
Alert on state-changing ORDS API requests originating from Referer values outside the approved application allow-list.
Baseline normal ORDS usage patterns per user and flag anomalous bursts of write operations tied to authenticated sessions.

Monitoring Recommendations

Instrument the web application firewall in front of ORDS to log and alert on cross-origin requests targeting /ords/ paths.
Review database audit trails for unauthorized INSERT, UPDATE, and DELETE events issued through ORDS service accounts.
Track user session activity for signs of concurrent authenticated actions from divergent client contexts.

How to Mitigate CVE-2025-30756

Immediate Actions Required

Apply the Oracle Critical Patch Update from July 2025 to all ORDS 24.2.0 deployments.
Restrict ORDS network exposure so only trusted networks and applications can reach the service.
Instruct administrators and privileged ORDS users to log out of the ORDS console when not actively working.

Patch Information

Oracle addressed CVE-2025-30756 in the July 2025 Critical Patch Update. Consult the Oracle Security Alert July 2025 for patch bundle identifiers and upgrade guidance for ORDS 24.2.0.

Workarounds

Enforce SameSite=Strict or SameSite=Lax attributes on ORDS session cookies at the reverse proxy layer.
Deploy a web application firewall rule that blocks state-changing HTTP methods missing an explicit anti-CSRF token or with an off-origin Referer.
Require re-authentication for sensitive ORDS operations to reduce the window during which forged requests would succeed.

bash

# Example NGINX reverse proxy hardening for ORDS session cookies
proxy_cookie_path / "/; HTTPOnly; Secure; SameSite=Strict";

# Reject cross-origin write requests to ORDS
map $http_origin $ords_origin_ok {
    default 0;
    "https://ords.example.com" 1;
}

location /ords/ {
    if ($request_method ~ ^(POST|PUT|PATCH|DELETE)$) {
        set $csrf_check "${ords_origin_ok}";
        if ($csrf_check = 0) { return 403; }
    }
    proxy_pass http://ords_backend;
}