Oracle WebCenter Portal 11.1.1.9.0/12.2.1.3.0/12.2.1.4.0 XStream code injection

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.
8.4$5k-$25k0.00

Summaryinfo

A vulnerability identified as very critical has been detected in Oracle WebCenter Portal 11.1.1.9.0/12.2.1.3.0/12.2.1.4.0. This vulnerability affects unknown code of the component XStream. This manipulation causes an unknown weakness. This vulnerability appears as CVE-2021-21345. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical was found in Oracle WebCenter Portal 11.1.1.9.0/12.2.1.3.0/12.2.1.4.0 (Content Management System). Affected by this vulnerability is some unknown functionality of the component XStream. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 07/20/2021 as Oracle Critical Patch Update Advisory - July 2021. It is possible to read the advisory at oracle.com. This vulnerability is known as CVE-2021-21345. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/23/2025). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

We expect the 0-day to have been worth approximately $25k-$100k.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.9
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

12/22/2020 🔍
07/20/2021 +209 days 🔍
07/20/2021 +0 days 🔍
07/21/2021 +1 days 🔍
05/23/2025 +1402 days 🔍

Sourcesinfo

Vendor: oracle.com

Advisory: Oracle Critical Patch Update Advisory - July 2021
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-21345 (🔍)
GCVE (CVE): GCVE-0-2021-21345
GCVE (VulDB): GCVE-100-179083

Entryinfo

Created: 07/21/2021 10:37
Updated: 05/23/2025 20:33
Changes: 07/21/2021 10:37 (39), 07/24/2021 05:43 (3), 07/24/2021 05:54 (19), 05/23/2025 20:33 (26)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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