What is CVE-2020-15339?

CVE-2020-15339 is a medium-severity vulnerability in Zyxel Cloudcnm Secumanager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-09-29.

How severe is CVE-2020-15339?

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

Is CVE-2020-15339 known to be exploited?

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

XSS in Zyxel Cloudcnm Secumanager

CVE-2020-15339

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows live/CPEManager/AXCampaignManager/handle_campaign_script_link?script_name= XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-09-29 · 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: 0.007 (52.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Zyxel Cloudcnm Secumanager — versions 3.1.0, 3.1.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2020-15339

References

pierrekim.github.io/blog/2020-03-09-zyxel-secumanager-0day-vulnerabilities.html (Exploit, Third Party Advisory)
www.zyxel.com/support/vulnerabilities-of-CloudCNM-SecuManager.shtml (Vendor Advisory)

Frequently asked questions

What is CVE-2020-15339?: CVE-2020-15339 is a medium-severity vulnerability in Zyxel Cloudcnm Secumanager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-09-29.
How severe is CVE-2020-15339?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-15339 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.