What is CVE-2018-10230?

CVE-2018-10230 is a medium-severity vulnerability in Zend Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-19.

How severe is CVE-2018-10230?

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

Is CVE-2018-10230 known to be exploited?

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

XSS in Zend Server

CVE-2018-10230

Zend Debugger in Zend Server before 9.1.3 has XSS, aka ZSR-2455.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-04-19 · 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: 0.026 (84.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.026 · change: -0.001

Affected products

Zend Server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.synacktiv.com/ressources/zend_server_9_1_3_xss.pdf (Third Party Advisory)
www.zend.com/en/products/server/release-notes (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2018-10230?: CVE-2018-10230 is a medium-severity vulnerability in Zend Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-19.
How severe is CVE-2018-10230?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2018-10230 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.