Stack-Based Buffer Overflow in Oat++ Affects Remote Serialization
CVE-2025-6566

6.9MEDIUM

Key Information:

Vendor

Oatpp

Status
Oat++
Vendor
CVE Published:
24 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6566?

A vulnerability has been discovered in the Oat++ framework that affects the deserializeArray function located in src/oatpp/json/Deserializer.cpp. This flaw can lead to a stack-based buffer overflow, allowing attackers to exploit the vulnerability remotely. The exploit could result in unexpected behavior or system compromise, highlighting the need for immediate attention and mitigation strategies. Public disclosure of this vulnerability raises security concerns for deployments relying on affected versions of Oat++.

Affected Version(s)

Oat++ 1.3.0

Oat++ 1.3.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6566 - Proof of Concept

References

https://vuldb.com/?id.313738
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313738
signaturepermissions-required
https://vuldb.com/?submit.597453
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

JJLeo (VulDB User)
.
CVE-2025-6566 : Stack-Based Buffer Overflow in Oat++ Affects Remote Serialization