How severe is CVE-2025-27379?

CVE-2025-27379 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2025-27379 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27379?

CVE-2025-27379 affects Altium On-prem Enterprise Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27379?

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

Does CVE-2025-27379 have an EU (EUVD) identifier?

Yes. CVE-2025-27379 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4172.

When was CVE-2025-27379 published?

CVE-2025-27379 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2025-27379

CVE-2025-27379 is a medium-severity vulnerability in Altium On-prem Enterprise Server with a CVSS 3.x base score of 6.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4172
Weakness: CWE-79
Affected product: Altium On-prem Enterprise Server
Published: 2026-01-22
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability in the BOM Viewer in Altium AES 7.0.3 allows an authenticated attacker to inject arbitrary JavaScript into the Description field of a schematic, which is executed when the BOM Viewer renders the affected content.

Frequently asked questions

What is CVE-2025-27379?: A stored cross-site scripting (XSS) vulnerability in the BOM Viewer in Altium AES 7.0.3 allows an authenticated attacker to inject arbitrary JavaScript into the Description field of a schematic, which is executed when the BOM Viewer renders the affected content.
How severe is CVE-2025-27379?: CVE-2025-27379 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2025-27379 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27379?: CVE-2025-27379 affects Altium On-prem Enterprise Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27379?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27379 have an EU (EUVD) identifier?: Yes. CVE-2025-27379 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4172.
When was CVE-2025-27379 published?: CVE-2025-27379 was published on 2026-01-22 and last updated on 2026-06-17.

References

https://www.altium.com/platform/security-compliance/security-advisories

Affected products (1)

cpe:2.3:a:altium:on-prem_enterprise_server:*:*:*:*:*:*:*:*

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