What is CVE-2018-4876?

CVE-2018-4876 is a medium-severity vulnerability in Adobe Experience Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-02-27.

How severe is CVE-2018-4876?

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

XSS in Adobe Experience Manager

CVE-2018-4876

Adobe Experience Manager versions 6.3, 6.2, and 6.1 are vulnerable to cross-site scripting via a bypass of the Sling XSSAPI#getValidHref function.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-02-27 · 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: 0.040 (90.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000

Affected products

Adobe Experience Manager — versions 6.1.0, 6.2.0, 6.3.0
Adobe Experience Manager 6.3, 6.2, 6.1 — versions Adobe Experience Manager 6.3, 6.2, 6.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

helpx.adobe.com/security/products/experience-manager/apsb18-04.html (Patch, Vendor Advisory)
www.securitytracker.com/id/1040365 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/102990 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-4876?: CVE-2018-4876 is a medium-severity vulnerability in Adobe Experience Manager, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-02-27.
How severe is CVE-2018-4876?: Medium severity. CVSS v3 base score is 6.1 out of 10.