CVE-2025-6566
CVE-2025-6566 is a medium-severity vulnerability in Oatpp Oat++ with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- CVSS v4: 5.5
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-19006
- Weakness: CWE-787
- Affected product: Oatpp Oat++
- Published:
- Last modified:
Description
A vulnerability was found in oatpp Oat++ up to 1.3.1. It has been declared as critical. This vulnerability affects the function deserializeArray of the file src/oatpp/json/Deserializer.cpp. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Frequently asked questions
- What is CVE-2025-6566?
- A vulnerability was found in oatpp Oat++ up to 1.3.1. It has been declared as critical. This vulnerability affects the function deserializeArray of the file src/oatpp/json/Deserializer.cpp. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
- How severe is CVE-2025-6566?
- CVE-2025-6566 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2025-6566 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-6566?
- CVE-2025-6566 affects Oatpp Oat++. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-6566?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-6566 have an EU (EUVD) identifier?
- Yes. CVE-2025-6566 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19006.
- When was CVE-2025-6566 published?
- CVE-2025-6566 was published on 2025-06-24 and last updated on 2026-06-17.
References
- https://github.com/oatpp/oatpp/issues/1037
- https://github.com/user-attachments/files/19579448/oatpp_crash.txt
- https://vuldb.com/?ctiid.313738
- https://vuldb.com/?id.313738
- https://vuldb.com/?submit.597453
Affected products (1)
- cpe:2.3:a:oatpp:oat\+\+:*:*:*:*:*:*:*:*
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