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🛡️ CVE-2025-4575 — openssl

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-295 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability low.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: Low — limited, and the attacker does not choose what is affected.

Weakness class

CVE-2025-4575 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.

Affected software

CVE-2025-4575 is recorded against 1 package.

  • openssl

Timeline and source

Published on 22 May 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
openssl-library.org
www.openwall.com

Other advisories for this package

openssl has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-295: Improper Certificate Validation) in other software:

CVE-2025-4575 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CWE CWE-295
Public Exploit ✅ No
Source NVD
Published 2025-05-22
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
openssl — —

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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