Oracle Siebel Apps-Marketing up to 22.8 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 (≈)
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CTI Interest Score
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8.9$5k-$25k0.00

Summaryinfo

A vulnerability was found in Oracle Siebel Apps-Marketing up to 22.8 and classified as very critical. Affected by this vulnerability is an unknown functionality of the component Marketing. Executing a manipulation can lead to an unknown weakness. The identification of this vulnerability is CVE-2021-23926. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Oracle Siebel Apps-Marketing up to 22.8 (Marketing Software) and classified as very critical. This vulnerability affects an unknown code of the component Marketing. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and availability.

The weakness was shared 10/19/2022 as Oracle Critical Patch Update Advisory - October 2022. The advisory is shared for download at oracle.com. This vulnerability was named 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). Once again VulDB remains the best source for vulnerability data.

Productinfo

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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
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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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 🔍
10/19/2022 +644 days 🔍
10/19/2022 +0 days 🔍
10/19/2022 +0 days 🔍
01/25/2026 +1194 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - October 2022
Status: Confirmed

CVE: CVE-2021-23926 (🔍)
GCVE (CVE): GCVE-0-2021-23926
GCVE (VulDB): GCVE-100-211684

Entryinfo

Created: 10/19/2022 08:30
Updated: 01/25/2026 15:48
Changes: 10/19/2022 08:30 (38), 11/17/2022 14:28 (2), 11/17/2022 14:30 (19), 01/25/2026 15:48 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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