How severe is CVE-2025-27380?

CVE-2025-27380 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-27380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27380?

CVE-2025-27380 affects Altium On-prem Enterprise Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27380?

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-2025-27380 have an EU (EUVD) identifier?

Yes. CVE-2025-27380 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4174.

When was CVE-2025-27380 published?

CVE-2025-27380 was published on 2026-01-22 and last updated on 2026-06-17.

CVE-2025-27380

CVE-2025-27380 is a high-severity vulnerability in Altium On-prem Enterprise Server with a CVSS 3.x base score of 7.6. 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: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4174
Weakness: CWE-79
Affected product: Altium On-prem Enterprise Server
Published: 2026-01-22
Last modified: 2026-06-17

Description

HTML injection in Project Release in Altium Enterprise Server (AES) 7.0.3 on all platforms allows an authenticated attacker to execute arbitrary JavaScript in the victim’s browser via crafted HTML content.

Frequently asked questions

What is CVE-2025-27380?: HTML injection in Project Release in Altium Enterprise Server (AES) 7.0.3 on all platforms allows an authenticated attacker to execute arbitrary JavaScript in the victim’s browser via crafted HTML content.
How severe is CVE-2025-27380?: CVE-2025-27380 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-27380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27380?: CVE-2025-27380 affects Altium On-prem Enterprise Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27380?: 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-2025-27380 have an EU (EUVD) identifier?: Yes. CVE-2025-27380 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4174.
When was CVE-2025-27380 published?: CVE-2025-27380 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:*:*:*:*:*:*:*:*

More vulnerabilities in Altium On-prem Enterprise Server

CVE-2026-11420 — Critical (CVSS 9.8): Two path traversal vulnerabilities in the Network Installation Service (NIS) of Altium Enterprise Server allow an…
CVE-2026-11414 — Critical (CVSS 9.8): A hard-coded cryptographic key is used by Altium Enterprise Server to sign file download URLs in the Vault service.…
CVE-2026-11419 — High (CVSS 8.8): A path traversal vulnerability exists in the Altium Enterprise Server Vault Service UploadController due to improper…
CVE-2025-27378 — High (CVSS 8.6): AES contains a SQL injection vulnerability due to an inactive configuration that prevents the latest SQL parsing logic…
CVE-2026-1010 — High (CVSS 8.0): A stored cross-site scripting (XSS) vulnerability exists in the Altium Workflow Engine due to missing server-side input…
CVE-2025-27379 — Medium (CVSS 6.8): A stored cross-site scripting (XSS) vulnerability in the BOM Viewer in Altium AES 7.0.3 allows an authenticated…

All CVEs affecting Altium On-prem Enterprise Server →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →