What is CVE-2018-9993?

CVE-2018-9993 is a medium-severity vulnerability in Yunucms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-04-10.

How severe is CVE-2018-9993?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Yunucms

CVE-2018-9993

YUNUCMS 1.0.7 has XSS via the content title on an admin/content/addcontent/cid/## page (aka a news center page).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% 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

Yunucms — versions 1.0.7

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/imsebao/404team/blob/master/yunucms/yunucms.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-9993?: CVE-2018-9993 is a medium-severity vulnerability in Yunucms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-04-10.
How severe is CVE-2018-9993?: Medium severity. CVSS v3 base score is 4.8 out of 10.