CVE-2024-20908: Oracle WebCenter Sites Auth Bypass Flaw

CVE-2024-20908 Overview

CVE-2024-20908 affects the Advanced UI component of Oracle WebCenter Sites, part of Oracle Fusion Middleware. An unauthenticated attacker with network access via HTTP can exploit the flaw when a legitimate user interacts with a crafted request or link. Successful exploitation results in unauthorized read access to a subset of data and unauthorized update, insert, or delete access to some data within Oracle WebCenter Sites. The vulnerability includes a scope change, meaning attacks may impact components beyond WebCenter Sites itself. Oracle addressed the issue in the Critical Patch Update released in January 2024.

Critical Impact
Attackers can trigger unauthorized data modification and limited disclosure across Oracle WebCenter Sites and adjacent components through a single user interaction over HTTP.

Affected Products

Oracle WebCenter Sites 12.2.1.4.0
Oracle Fusion Middleware deployments running the Advanced UI component
Downstream products sharing scope with an exploited WebCenter Sites instance

Discovery Timeline

2024-01-16 - Oracle publishes the January 2024 Critical Patch Update addressing CVE-2024-20908
2024-01-16 - CVE-2024-20908 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-20908

Vulnerability Analysis

The flaw resides in the Advanced UI component of Oracle WebCenter Sites 12.2.1.4.0. An unauthenticated remote attacker sends crafted HTTP traffic that leverages a victim user's session context to perform unauthorized operations. The victim must interact with attacker-supplied content, such as clicking a link or loading a rendered page. Because the vulnerability produces a scope change, execution in WebCenter Sites can influence resources belonging to other Oracle Fusion Middleware components. Oracle categorizes the confidentiality and integrity impact as low, with no direct availability impact. The public advisory from Oracle does not disclose the underlying weakness class, and NVD lists the CWE as NVD-CWE-noinfo. The EPSS probability of exploitation is 0.327% with a percentile of 25.37, indicating limited observed exploitation activity as of the most recent scoring.

Root Cause

Oracle has not published the specific root cause. The combination of required user interaction, network attack vector, changed scope, and partial confidentiality and integrity impact is consistent with a client-side injection or cross-context flaw in the Advanced UI rendering path. Consult the Oracle Critical Patch Update January 2024 advisory for authoritative details.

Attack Vector

An attacker delivers a crafted HTTP request or URL to a user with access to Oracle WebCenter Sites. When the victim processes the request in an authenticated context, the Advanced UI component performs actions that read a subset of accessible data and write to some accessible data. The scope change indicates the effect extends beyond the WebCenter Sites security boundary into adjacent components.

No verified public exploit code or proof-of-concept has been released. Technical details are limited to Oracle's advisory.

Detection Methods for CVE-2024-20908

Indicators of Compromise

Unexpected HTTP requests to Oracle WebCenter Sites Advanced UI endpoints originating from external referrers or embedded in third-party pages
Content, template, or asset modifications in WebCenter Sites that do not match authorized editorial workflows
Session activity from privileged content editors immediately following clicks on external links or emails
Cross-component API calls from WebCenter Sites service accounts to other Fusion Middleware components without a corresponding business action

Detection Strategies

Review WebCenter Sites application and web server logs for HTTP requests to Advanced UI URLs containing suspicious parameters or encoded payloads
Correlate content management audit events with the initiating user's browser session and referrer to spot interaction-triggered changes
Baseline normal traffic to Advanced UI endpoints and alert on volume spikes or requests from atypical geolocations and user agents

Monitoring Recommendations

Forward WebCenter Sites, WebLogic, and reverse proxy logs into a centralized analytics platform for correlation across the Fusion Middleware stack
Monitor authenticated user sessions for state changes that occur without corresponding UI navigation events
Track privileged account activity and enable alerting on content publish, insert, update, and delete actions outside of business hours

How to Mitigate CVE-2024-20908

Immediate Actions Required

Apply the January 2024 Oracle Critical Patch Update to all Oracle WebCenter Sites 12.2.1.4.0 deployments
Inventory Fusion Middleware environments to identify any unpatched WebCenter Sites instances exposed to internal or external users
Restrict Advanced UI access to trusted network segments and authenticated editorial users while patching proceeds
Educate content editors and administrators about link-based social engineering targeting WebCenter Sites sessions

Patch Information

Oracle addressed CVE-2024-20908 in the January 2024 Critical Patch Update. Administrators should review the Oracle Critical Patch Update January 2024 advisory and apply the applicable WebCenter Sites patch to the affected 12.2.1.4.0 release.

Workarounds

Place Oracle WebCenter Sites behind a web application firewall with rules blocking suspicious Advanced UI request patterns
Enforce strict SameSite cookie attributes and short session lifetimes for WebCenter Sites administrative accounts
Require multi-factor authentication and network-level access controls, such as VPN or zero trust gateways, before administrative users can reach the application
Disable or restrict access to Advanced UI features for user roles that do not require them until patching is complete

bash

# Configuration example
# Refer to the Oracle Critical Patch Update January 2024 advisory
# for the authoritative patch procedure for Oracle WebCenter Sites 12.2.1.4.0