How severe is CVE-2025-66648?

CVE-2025-66648 has a CVSS 3.x base score of 7.2, 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 none.

Is CVE-2025-66648 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66648?

CVE-2025-66648 affects Vega-functions Project Vega-functions. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66648?

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-2025-66648 have an EU (EUVD) identifier?

Yes. CVE-2025-66648 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206236.

When was CVE-2025-66648 published?

CVE-2025-66648 was published on 2026-01-05 and last updated on 2026-06-17.

CVE-2025-66648

CVE-2025-66648 is a high-severity vulnerability in Vega-functions Project Vega-functions with a CVSS 3.x base score of 7.2. 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-79.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206236
Weakness: CWE-79
Affected product: Vega-functions Project Vega-functions
Published: 2026-01-05
Last modified: 2026-06-17

Description

vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions `6.1.1`. There is no workaround besides upgrading. Using `vega.expressionInterpreter` as described in CSP safe mode does not prevent this issue.

Frequently asked questions

What is CVE-2025-66648?: vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions `6.1.1`. There is no workaround besides upgrading. Using `vega.expressionInterpreter` as described in CSP safe mode does not prevent this issue.
How severe is CVE-2025-66648?: CVE-2025-66648 has a CVSS 3.x base score of 7.2, 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 none.
Is CVE-2025-66648 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66648?: CVE-2025-66648 affects Vega-functions Project Vega-functions. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66648?: 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-2025-66648 have an EU (EUVD) identifier?: Yes. CVE-2025-66648 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206236.
When was CVE-2025-66648 published?: CVE-2025-66648 was published on 2026-01-05 and last updated on 2026-06-17.

References

https://github.com/vega/vega/security/advisories/GHSA-m9rg-mr6g-75gm

Affected products (1)

cpe:2.3:a:vega-functions_project:vega-functions:*:*:*:*:*:node.js:*:*

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