What is CVE-2015-9364?

CVE-2015-9364 is a medium-severity vulnerability in 2checkout Ithemes, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-28.

How severe is CVE-2015-9364?

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

Is CVE-2015-9364 known to be exploited?

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

XSS in 2checkout Ithemes

CVE-2015-9364

2Checkout Add-on for iThemes Exchange before 1.1.0 for WordPress has XSS via add_query_arg() and remove_query_arg().

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-28 · 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: 0.009 (59.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

2checkout Ithemes

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

blog.sucuri.net/2015/04/security-advisory-xss-vulnerability-affecting-multiple-… (Third Party Advisory)
ithemes.com/coordinated-wordpress-plugin-security-update/ (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2015-9364?: CVE-2015-9364 is a medium-severity vulnerability in 2checkout Ithemes, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-28.
How severe is CVE-2015-9364?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2015-9364 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.