How severe is CVE-2025-15099?

CVE-2025-15099 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-15099 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15099?

CVE-2025-15099 affects Sim. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15099?

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-2025-15099 have an EU (EUVD) identifier?

Yes. CVE-2025-15099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205425.

When was CVE-2025-15099 published?

CVE-2025-15099 was published on 2025-12-26 and last updated on 2026-06-17.

CVE-2025-15099

CVE-2025-15099 is a high-severity vulnerability in Sim with a CVSS 3.x base score of 7.3. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205425
Weakness: CWE-287
Affected product: Sim
Published: 2025-12-26
Last modified: 2026-06-17

Description

A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is e359dc2946b12ed5e45a0ec9c95ecf91bd18502a. Applying a patch is the recommended action to fix this issue.

Frequently asked questions

What is CVE-2025-15099?: A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is e359dc2946b12ed5e45a0ec9c95ecf91bd18502a. Applying a patch is the recommended action to fix this issue.
How severe is CVE-2025-15099?: CVE-2025-15099 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-15099 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15099?: CVE-2025-15099 affects Sim. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15099?: 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-2025-15099 have an EU (EUVD) identifier?: Yes. CVE-2025-15099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205425.
When was CVE-2025-15099 published?: CVE-2025-15099 was published on 2025-12-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sim:sim:*:*:*:*:*:*:*:*

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