How severe is CVE-2025-15056?

CVE-2025-15056 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-15056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15056?

CVE-2025-15056 affects Slab Quill. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15056?

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

Does CVE-2025-15056 have an EU (EUVD) identifier?

Yes. CVE-2025-15056 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2033.

When was CVE-2025-15056 published?

CVE-2025-15056 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2025-15056

CVE-2025-15056 is a medium-severity vulnerability in Slab Quill with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2033
Weakness: CWE-79
Affected product: Slab Quill
Published: 2026-01-13
Last modified: 2026-06-17

Description

A lack of data validation vulnerability in the HTML export feature in Quill in allows Cross-Site Scripting (XSS). This issue affects Quill: 2.0.3.

Frequently asked questions

What is CVE-2025-15056?: A lack of data validation vulnerability in the HTML export feature in Quill in allows Cross-Site Scripting (XSS). This issue affects Quill: 2.0.3.
How severe is CVE-2025-15056?: CVE-2025-15056 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-15056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15056?: CVE-2025-15056 affects Slab Quill. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15056?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15056 have an EU (EUVD) identifier?: Yes. CVE-2025-15056 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2033.
When was CVE-2025-15056 published?: CVE-2025-15056 was published on 2026-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:slab:quill:2.0.3:*:*:*:*:node.js:*:*

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