6.5

CVE-2025-4575: openssl Improper Certificate Validation

CVSS: 6.5v3.1MediumAnalyzed
AliasesALPINE-CVE-2025-4575DEBIAN-CVE-2025-4575CGA-8jcv-q48j-26p5
Published 22-05-2025Last modified 22-05-2025
Open JSON

Vulnerability summary

CVE-2025-4575 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in openssl. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.3% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
OPENSUSE-SU-2025:15183-1CGA-97MC-5JRP-289H

Timeline

  1. 22-05-2025
    PublishedVulnerability first disclosed.
  2. 22-05-2025
    Last modifiedVulnerability information updated.

Description

Issue summary: Use of -addreject option with the openssl x509 application adds a trusted use instead of a rejected use for a certificate. Impact summary: If a user intends to make a trusted certificate rejected for a particular use it will be instead marked as trusted for that use. A copy & paste error during minor refactoring of the code introduced this issue in the OpenSSL 3.5 version. If, for example, a trusted CA certificate should be trusted only for the purpose of authenticating TLS servers but not for CMS signature verification and the CMS signature verification is intended to be marked as rejected with the -addreject option, the resulting CA certificate will be trusted for CMS signature verification purpose instead. Only users which use the trusted certificate format who use the openssl x509 command line application to add rejected uses are affected by this issue. The issues affecting only the command line application are considered to be Low severity. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 3.4, 3.3, 3.2, 3.1, 3.0, 1.1.1 and 1.0.2 are also not affected by this issue.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.02 pp

From 0.36% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard7 products
  • libcrypto3< 3.5.1-r0
  • libcrypto3-2.34< 3.5.1-r0
  • openssl< 3.5.1-r0
  • openssl-doc< 3.5.0-r2
  • openssl-provider-fipsAll versions (No fix recorded)
Wolfi3 products
  • libcrypto3< 3.5.1-r0
  • openssl< 3.5.1-r0
  • openssl-doc< 3.5.0-r2
Alpine1 product
  • openssl< 3.5.1-r0
Debian1 product
  • openssl< 3.5.0-2
Openssl1 product

5 vendors · 13 products

References

7 links