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Oracle WebCenter Sites CVE-2026-101499

| EUVDEUVD-2026-105914 CRITICAL
Improper Authentication (CWE-287)
2026-10-20 secalert_us@oracle.com GHSA-fpgm-6497-5846
9.8
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify exposed WebCenter Sites HTTP endpoint
  2. Delivery
    Send crafted unauthenticated HTTP request
  3. Exploit
    Trigger vulnerability in WebCenter Sites component
  4. Execution
    Gain full application control
  5. Impact
    Take over WebCenter Sites (read/modify/disrupt)

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special conditions - remote unauthenticated exploitation over HTTP against Oracle WebCenter Sites (component: WebCenter Sites) as described by the vendor, with no authentication, user interaction, or non-default configuration stated as required (AV:N/AC:L/PR:N/UI:N). The primary LIMITING factors are therefore deployment-based rather than technical: the attacker must have network/HTTP reachability to a vulnerable instance, and only supported versions 12.2.1.4.0 and 14.1.2.0.0 are confirmed affected. The CVE description names no specific feature, protocol mode, or configuration toggle as a precondition, so exploitation appears to apply to default installations of the affected versions.

Impact

All CVSS signals point to maximum network-exploitability: the vendor-supplied vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (base 9.8) means a remote, unauthenticated attacker over HTTP with low attack complexity and no user interaction can achieve full confidentiality, integrity, and availability compromise - Oracle explicitly describes this as 'takeover of Oracle WebCenter Sites.' This is the archetype of a genuine patch-now priority rather than a high-CVSS-but-low-real-risk issue, because the pre-authentication network vector removes the usual mitigating prerequisites. However, several real-world exploitation signals are MISSING from the input and must not be assumed: no EPSS probability was provided, the CVE is NOT listed as KEV (no confirmed active exploitation), and no public POC is referenced, so this is best characterized as high potential severity with no confirmed exploitation yet. Note also a conflict in the provided metadata: the only tag describing impact is 'Information Disclosure,' which understates a vulnerability that the description and CVSS both rate as full C/I/A takeover - treat the full-takeover characterization (vendor + CVSS) as authoritative over the tag.

Exploit ScenarioDerived

An attacker reachable over the network sends a crafted HTTP request directly to an internet-exposed or internal Oracle WebCenter Sites instance (versions 12.2.1.4.0 or 14.1.2.0.0) without any credentials. Because attack complexity is low and no user interaction is required, a single request chain can escalate to full application takeover, letting the attacker read/modify content and control the server. No public exploit code is identified at time of analysis, so this scenario is based on the vendor-described capability rather than an observed exploit.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Unauthenticated remote takeover of Oracle WebCenter Sites is possible in supported versions 12.2.1.4.0 and 14.1.2.0.0, per Oracle Fusion Middleware's October 2026 advisory. The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H means network attackers need no credentials or user interaction and can fully compromise confidentiality, integrity, and availability. No public exploit code or CISA KEV entry was identified in the supplied data at time of analysis.

RemediationAI

Apply the Oracle Critical Patch Update referenced in the vendor advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; the supplied data identifies this advisory as the patch source but does not state an exact fixed build, so confirm the applicable WebCenter Sites CPU patch number and upgrade affected 12.2.1.4.0 and 14.1.2.0.0 installations. Until patching is complete, reduce exposure by placing WebCenter Sites behind a reverse proxy or network ACL that permits only trusted clients to reach its HTTP interfaces; this can disrupt legitimate external publishing or authoring access, so scope it to business needs. Because the vector is pre-authentication (PR:N), do not treat login requirements or account hardening as sufficient mitigation; monitor web access logs for unauthenticated anomalous requests, and use WAF or virtual patching only as a temporary compensating control with validation.

Affected VersionsENISA

Oracle WebCenter Sites 14.1.2.0.0
Oracle WebCenter Sites 12.2.1.4.0

Affected Packages

euvd oracle_webcenter_sites no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Oracle WebCenter Sites is an Oracle Fusion Middleware web content management and delivery platform exposed over HTTP, and the affected component is identified simply as WebCenter Sites. The supplied data does not include a CWE, so the precise root-cause class cannot be confirmed; however, the vendor vector AV:N/AC:L/PR:N/UI:N and the stated outcome of 'takeover' indicate an externally reachable web application weakness that is exploitable without prior authentication or user interaction. Only the supported releases 12.2.1.4.0 and 14.1.2.0.0 are confirmed affected, and the description names no special feature, protocol mode, or non-default configuration toggle as a precondition, so default installations of those versions should be treated as exposed if their HTTP interfaces are reachable.

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Severity by source

Vendor (oracle) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 9.8 CRITICAL

Vendor describes remote unauthenticated HTTP exploitation with low complexity and full takeover, so AV:N/AC:L/PR:N/UI:N and C:H/I:H/A:H; scope unchanged as impact stays within the application.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Sites. Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Sites. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

Oracle WebCenter Sites, the platform behind many public-facing enterprise web properties, is exposed to unauthenticated remote takeover in supported versions 12.2.1.4.0 and 14.1.2.0.0, meaning any internet user could gain full control of affected systems without credentials. Leadership should care because a compromise could expose customer data, allow defacement or malicious content injection on trusted public sites, and disrupt a system that is often treated as trusted infrastructure for external content delivery.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict network reachability of WebCenter Sites administrative and authoring interfaces to trusted networks or VPN, front internet-facing instances with a WAF or reverse proxy applying restrictive rules, segment affected systems from sensitive internal networks, enforce monitoring and alerting for anomalous access, and review Oracle advisory guidance for any vendor-provided workaround.

Threat Intelligence Overview

EPSS Score
0.5%
Top 57% exploitable
Prevalence
Low
niche enterprise web experience management CMS, limited deployment footprint
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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