CVE-2025-56449
CVE-2025-56449 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. 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-290.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 0% (27th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-31578
- Weakness: CWE-290
- Published:
- Last modified:
Description
A security vulnerability was identified in Obsidian Scheduler's REST API 5.0.0 thru 6.3.0. If an account is locked out due to not enrolling in MFA (e.g. after the 7-day enforcement window), the REST API still allows the use of Basic Authentication to authenticate and perform administrative actions. In particular, the default admin account was found to be locked out via the web interface but still usable through the REST API. This allowed creation of a new privileged user, bypassing MFA protections. This undermines the intended security posture of MFA enforcement.
Frequently asked questions
- What is CVE-2025-56449?
- A security vulnerability was identified in Obsidian Scheduler's REST API 5.0.0 thru 6.3.0. If an account is locked out due to not enrolling in MFA (e.g. after the 7-day enforcement window), the REST API still allows the use of Basic Authentication to authenticate and perform administrative actions. In particular, the default admin account was found to be locked out via the web interface but still usable through the REST API. This allowed creation of a new privileged user, bypassing MFA protections. This undermines the intended security posture of MFA enforcement.
- How severe is CVE-2025-56449?
- CVE-2025-56449 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2025-56449 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-56449?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-56449 have an EU (EUVD) identifier?
- Yes. CVE-2025-56449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31578.
- When was CVE-2025-56449 published?
- CVE-2025-56449 was published on 2025-09-29 and last updated on 2026-06-17.
References
- https://blog.gregscharf.com/2025/07/11/upcoming-vulnerability-advisory/
- https://blog.gregscharf.com/2025/07/31/obsidian-scheduler-access-control-vulnerability/
- https://wiki.obsidianscheduler.com/docs/Release_Notes#Obsidian_6.3.1
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