What is CVE-2021-35265?

CVE-2021-35265 is a medium-severity vulnerability in Maxsite Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-03.

How severe is CVE-2021-35265?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-35265 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Maxsite Cms

CVE-2021-35265

A reflected cross-site scripting (XSS) vulnerability in MaxSite CMS before V106 via product/page/* allows remote attackers to inject arbitrary web script to a page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.034 (88.5th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Maxsite Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/maxsite/cms/issues/414 (Exploit, Third Party Advisory)
github.com/maxsite/cms/commit/6b0ab1de9f3d471485d1347e800a9ce43fedbf1a (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-35265?: CVE-2021-35265 is a medium-severity vulnerability in Maxsite Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-03.
How severe is CVE-2021-35265?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-35265 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.