How severe is CVE-2025-8419?

CVE-2025-8419 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 low, and availability none.

Is CVE-2025-8419 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8419?

CVE-2025-8419 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8419?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-8419 have an EU (EUVD) identifier?

Yes. CVE-2025-8419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23863.

When was CVE-2025-8419 published?

CVE-2025-8419 was published on 2025-08-06 and last updated on 2026-06-17.

CVE-2025-8419

CVE-2025-8419 is a medium-severity vulnerability in Redhat Keycloak 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-93.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23863
Weakness: CWE-93
Affected product: Redhat Keycloak
Published: 2025-08-06
Last modified: 2026-06-17

Description

A vulnerability was found in Keycloak-services. Special characters used during e-mail registration may perform SMTP Injection and unexpectedly send short unwanted e-mails. The email is limited to 64 characters (limited local part of the email), so the attack is limited to very shorts emails (subject and little data, the example is 60 chars). This flaw's only direct consequence is an unsolicited email being sent from the Keycloak server. However, this action could be a precursor for more sophisticated attacks.

Frequently asked questions

What is CVE-2025-8419?: A vulnerability was found in Keycloak-services. Special characters used during e-mail registration may perform SMTP Injection and unexpectedly send short unwanted e-mails. The email is limited to 64 characters (limited local part of the email), so the attack is limited to very shorts emails (subject and little data, the example is 60 chars). This flaw's only direct consequence is an unsolicited email being sent from the Keycloak server. However, this action could be a precursor for more sophisticated attacks.
How severe is CVE-2025-8419?: CVE-2025-8419 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 low, and availability none.
Is CVE-2025-8419 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8419?: CVE-2025-8419 affects Redhat Keycloak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8419?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-8419 have an EU (EUVD) identifier?: Yes. CVE-2025-8419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23863.
When was CVE-2025-8419 published?: CVE-2025-8419 was published on 2025-08-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*

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