CVE-2025-42603
CVE-2025-42603 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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-319.
Key facts
- Severity: High (CVSS 4.0 base score 8.7)
- EPSS exploit prediction: 0% (18th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-12235
- Weakness: CWE-319
- Published:
- Last modified:
Description
This vulnerability exists in the Meon KYC solutions due to transmission of sensitive data in plain text within the response payloads of certain API endpoints. An authenticated remote attacker could exploit this vulnerability by intercepting API response that contains unencrypted sensitive information belonging to other users. Successful exploitation of this vulnerability could allow remote attacker to impersonate the target user and gain unauthorized access to the user account.
Frequently asked questions
- What is CVE-2025-42603?
- This vulnerability exists in the Meon KYC solutions due to transmission of sensitive data in plain text within the response payloads of certain API endpoints. An authenticated remote attacker could exploit this vulnerability by intercepting API response that contains unencrypted sensitive information belonging to other users. Successful exploitation of this vulnerability could allow remote attacker to impersonate the target user and gain unauthorized access to the user account.
- How severe is CVE-2025-42603?
- CVE-2025-42603 has a CVSS 4.0 base score of 8.7, rated high severity.
- Is CVE-2025-42603 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-42603?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-42603 have an EU (EUVD) identifier?
- Yes. CVE-2025-42603 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12235.
- When was CVE-2025-42603 published?
- CVE-2025-42603 was published on 2025-04-23 and last updated on 2026-06-17.
References
Other CWE-319 (Cleartext Transmission of Sensitive Information) vulnerabilities
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