What is CVE-2021-28088?

CVE-2021-28088 is a medium-severity vulnerability in Impresscms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-11.

How severe is CVE-2021-28088?

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

XSS in Impresscms

CVE-2021-28088

Cross-site scripting (XSS) in modules/content/admin/content.php in ImpressCMS profile 1.4.2 allows remote attackers to inject arbitrary web script or HTML parameters through the "Display Name" field.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-03-11 · 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: 0.009 (57.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Impresscms — versions 1.4.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

anotepad.com/note/read/s3kkk6h7 (Exploit, Third Party Advisory)
hackerone.com/reports/1119296 (Permissions Required, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28088?: CVE-2021-28088 is a medium-severity vulnerability in Impresscms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-11.
How severe is CVE-2021-28088?: Medium severity. CVSS v3 base score is 5.4 out of 10.