What is CVE-2018-8805?

CVE-2018-8805 is a medium-severity vulnerability in Yxcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-20.

How severe is CVE-2018-8805?

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

XSS in Yxcms

CVE-2018-8805

Yxcms building system (compatible cell phone) v1.4.7 has XSS via the content parameter to protected\apps\default\view\default\extend_guestbook.php or protected\apps\default\view\mobile\extend_guestbook.php in an index.php?r=default/column/index&col=guestbook request.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.7% 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

Yxcms — versions 1.4.7

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/QQ704568679/YXcms-Code-audit/blob/master/Yxcms Code audit (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-8805?: CVE-2018-8805 is a medium-severity vulnerability in Yxcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-20.
How severe is CVE-2018-8805?: Medium severity. CVSS v3 base score is 6.1 out of 10.