Oracle SOA Suite 12.2.1.4.0 Fabric Layer xml entity expansion

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.9$5k-$25k0.00

Summaryinfo

A vulnerability described as very critical has been identified in Oracle SOA Suite 12.2.1.4.0. This affects an unknown function of the component Fabric Layer. The manipulation results in an unknown weakness. This vulnerability is reported as CVE-2021-23926. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as very critical has been found in Oracle SOA Suite 12.2.1.4.0. Affected is an unknown code block of the component Fabric Layer. CWE is classifying the issue as CWE-776. The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. This is going to have an impact on confidentiality, and availability.

The weakness was disclosed 07/18/2023 as Oracle Critical Patch Update Advisory - July 2023 as confirmed advisory (Website). The advisory is shared for download at oracle.com. This vulnerability is traded as CVE-2021-23926. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/25/2026).

As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 296368 (Oracle Business Intelligence Enterprise Edition (OAS 8.2) (January 2026 CPU)), which helps to determine the existence of the flaw in a target environment.

A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (296368). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml entity expansion
CWE: CWE-776
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 296368
Nessus Name: Oracle Business Intelligence Enterprise Edition (OAS 8.2) (January 2026 CPU)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

01/12/2021 🔍
07/18/2023 +916 days 🔍
07/18/2023 +0 days 🔍
07/19/2023 +1 days 🔍
01/25/2026 +921 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - July 2023
Status: Confirmed

CVE: CVE-2021-23926 (🔍)
GCVE (CVE): GCVE-0-2021-23926
GCVE (VulDB): GCVE-100-234792

Entryinfo

Created: 07/19/2023 06:38
Updated: 01/25/2026 15:48
Changes: 07/19/2023 06:38 (39), 08/13/2023 01:22 (2), 08/13/2023 01:29 (19), 01/25/2026 15:48 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!