What is CVE-2021-3662?

CVE-2021-3662 is a medium-severity vulnerability in HP Futuresmart 4, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-10-29.

How severe is CVE-2021-3662?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in HP Futuresmart 4

CVE-2021-3662

Certain HP Enterprise LaserJet and PageWide MFPs may be vulnerable to stored cross site scripting (XSS).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

HP Futuresmart 4
HP Futuresmart 5
HP Enterprise Laserjet Mfp; Pagewide Mfps; Digital Sender — versions before 4.11.2.1, before 5.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support.hp.com/us-en/document/ish_4577473-4577502-16/hpsbpi03744 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-3662?: CVE-2021-3662 is a medium-severity vulnerability in HP Futuresmart 4, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-10-29.
How severe is CVE-2021-3662?: Medium severity. CVSS v3 base score is 5.4 out of 10.