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CVE-2025-31124

MEDIUMCVSS 5.3/10EPSS 0.45%

Last modified

CVE-2025-31124 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Zitadel is open-source identity infrastructure software. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

Zitadel is open-source identity infrastructure software. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". While the setting was correctly respected during the login flow, the user's username was normalized leading to a disclosure of the user's existence. This vulnerability is fixed in 2.71.6, 2.70.8, 2.69.9, 2.68.9, 2.67.13, 2.66.16, 2.65.7, 2.64.6, and 2.63.9.

Metrics

CVSS 3.1
5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability
0.45%

36.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ZitadelZitadel< 2.63.9
ZitadelZitadel>= 2.64.0, < 2.64.6
ZitadelZitadel>= 2.65.0, < 2.65.7
ZitadelZitadel>= 2.66.0, < 2.66.16
ZitadelZitadel>= 2.67.0, < 2.67.13
ZitadelZitadel>= 2.68.0, < 2.68.9
ZitadelZitadel>= 2.69.0, < 2.69.9
ZitadelZitadel>= 2.70.0, < 2.70.8
ZitadelZitadel>= 2.71.0, < 2.71.6

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2025-31124?
Zitadel is open-source identity infrastructure software. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". While the setting was correctly respected during the login flow, the user's username was normalized leading to a disclosure of the user's existence. This vulnerability is fixed in 2.71.6, 2.70.8, 2.69.9, 2.68.9, 2.67.13, 2.66.16, 2.65.7, 2.64.6, and 2.63.9.
How severe is CVE-2025-31124?
CVE-2025-31124 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2025-31124?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-31124?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST