Oracle Banking Platform 2.4.0/2.7.1/2.9.0/2.12.0 XStream deserialization
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 8.4 | $5k-$25k | 0.00 |
Summary
A vulnerability identified as very critical has been detected in Oracle Banking Platform 2.4.0/2.7.1/2.9.0/2.12.0. This affects an unknown function of the component XStream. Performing a manipulation results in an unknown weakness. This vulnerability is known as CVE-2021-21345. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.
Details
A vulnerability classified as very critical has been found in Oracle Banking Platform 2.4.0/2.7.1/2.9.0/2.12.0 (Banking Software). This affects some unknown functionality of the component XStream. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability.
The weakness was published 07/20/2021 as Oracle Critical Patch Update Advisory - July 2021. It is possible to read the advisory at oracle.com. This vulnerability is uniquely identified 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).
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.
Be aware that VulDB is the high quality source for vulnerability data.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.oracle.com
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 8.5VulDB 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.): 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: DeserializationCWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
12/22/2020 🔍07/20/2021 🔍
07/20/2021 🔍
07/21/2021 🔍
05/23/2025 🔍
Sources
Vendor: oracle.comAdvisory: Oracle Critical Patch Update Advisory - July 2021
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2021-21345 (🔍)
GCVE (CVE): GCVE-0-2021-21345
GCVE (VulDB): GCVE-100-179055
Entry
Created: 07/21/2021 10:37Updated: 05/23/2025 20:33
Changes: 07/21/2021 10:37 (39), 07/23/2021 20:47 (3), 07/23/2021 20:54 (19), 05/23/2025 20:33 (26)
Complete: 🔍
Cache ID: 216::103
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