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CVE-2025-20258

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote...

5.4 Medium

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.30%Up 0.3 points since May 22, 2025
90%50%10%1%

What each source reports

CVE List Score used 5.4

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

Record
CVE-2025-20258
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-77
Updated
2026-11-03
EUVDEUVD-2025-16045 5.4

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

Record
EUVD-2025-16045
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-3c8c-p5w2-6pxx 5.4

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote...

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service.

This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

Record
GHSA-3c8c-p5w2-6pxx
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-77
Updated
2026-11-02
NVD 5.4

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

Record
CVE-2025-20258
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-77
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
factsCVE List, EUVD
first indexedCVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-20258 is a medium vulnerability (CVSS 5.4) in Cisco Duo, published May 21, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.

References

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