How severe is CVE-2026-1591?

CVE-2026-1591 has a CVSS 3.x base score of 6.3, rated medium 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-2026-1591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1591?

CVE-2026-1591 affects Foxit Pdf Editor Cloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1591?

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

Does CVE-2026-1591 have an EU (EUVD) identifier?

Yes. CVE-2026-1591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5187.

When was CVE-2026-1591 published?

CVE-2026-1591 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2026-1591

CVE-2026-1591 is a medium-severity vulnerability in Foxit Pdf Editor Cloud with a CVSS 3.x base score of 6.3. 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 6.3)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5187
Weakness: CWE-79
Affected product: Foxit Pdf Editor Cloud
Published: 2026-02-03
Last modified: 2026-06-17

Description

Foxit PDF Editor Cloud (pdfonline) contains a stored cross-site scripting vulnerability in the file upload feature. A malicious username is embedded into the upload file list without proper escaping, allowing arbitrary JavaScript execution when the list is displayed. This issue affects pdfonline.foxit.com: before 2026‑02‑03.

Frequently asked questions

What is CVE-2026-1591?: Foxit PDF Editor Cloud (pdfonline) contains a stored cross-site scripting vulnerability in the file upload feature. A malicious username is embedded into the upload file list without proper escaping, allowing arbitrary JavaScript execution when the list is displayed. This issue affects pdfonline.foxit.com: before 2026‑02‑03.
How severe is CVE-2026-1591?: CVE-2026-1591 has a CVSS 3.x base score of 6.3, rated medium 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-2026-1591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1591?: CVE-2026-1591 affects Foxit Pdf Editor Cloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1591 have an EU (EUVD) identifier?: Yes. CVE-2026-1591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5187.
When was CVE-2026-1591 published?: CVE-2026-1591 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://www.foxit.com/support/security-bulletins.html

Affected products (1)

cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:*

More vulnerabilities in Foxit Pdf Editor Cloud

CVE-2026-1592 — Medium (CVSS 6.3): Foxit PDF Editor Cloud (pdfonline) contains a stored cross-site scripting vulnerability in the Create New Layer…
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CVE-2025-66521 — Medium (CVSS 6.3): A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Trusted Certificates…
CVE-2025-66520 — Medium (CVSS 6.3): A stored cross-site scripting (XSS) vulnerability exists in the Portfolio feature of the Foxit PDF Editor cloud…
CVE-2025-66519 — Medium (CVSS 6.3): A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Layer Import functionality.…
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