How severe is CVE-2025-56503?

CVE-2025-56503 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-56503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-56503?

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

Does CVE-2025-56503 have an EU (EUVD) identifier?

Yes. CVE-2025-56503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50803.

When was CVE-2025-56503 published?

CVE-2025-56503 was published on 2025-11-10 and last updated on 2026-06-17.

CVE-2025-56503

CVE-2025-56503 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. 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-266.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-50803
Weakness: CWE-266
Published: 2025-11-10
Last modified: 2026-06-17

Description

An issue in Sublime HQ Pty Ltd Sublime Text 4 4200 allows authenticated attackers with low-level privileges to escalate privileges to Administrator via replacing the uninstall file with a crafted binary in the installation folder. NOTE: this is disputed by the Supplier because replacing the uninstall file requires administrator permissions, i.e., there is no privilege escalation.

Frequently asked questions

What is CVE-2025-56503?: An issue in Sublime HQ Pty Ltd Sublime Text 4 4200 allows authenticated attackers with low-level privileges to escalate privileges to Administrator via replacing the uninstall file with a crafted binary in the installation folder. NOTE: this is disputed by the Supplier because replacing the uninstall file requires administrator permissions, i.e., there is no privilege escalation.
How severe is CVE-2025-56503?: CVE-2025-56503 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-56503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-56503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-56503 have an EU (EUVD) identifier?: Yes. CVE-2025-56503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50803.
When was CVE-2025-56503 published?: CVE-2025-56503 was published on 2025-11-10 and last updated on 2026-06-17.

References

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