What is CVE-2018-18381?

CVE-2018-18381 is a medium-severity vulnerability in Zblogcn Z-Blogphp, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-10-16.

How severe is CVE-2018-18381?

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

XSS in Zblogcn Z-Blogphp

CVE-2018-18381

Z-BlogPHP 1.5.2.1935 (Zero) has a stored XSS Vulnerability in zb_system/function/c_system_admin.php via the Content-Type header during the uploading of image attachments.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-10-16 · 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: 0.005 (43.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.7% 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

Zblogcn Z-Blogphp — versions 1.5.2.1935

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/seedis/Z-BlogPHP/blob/master/Z-BlogPHP_stored_xss.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18381?: CVE-2018-18381 is a medium-severity vulnerability in Zblogcn Z-Blogphp, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-10-16.
How severe is CVE-2018-18381?: Medium severity. CVSS v3 base score is 5.4 out of 10.