What is CVE-2017-18603?

CVE-2017-18603 is a medium-severity vulnerability in Postman-Smtp Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-09-10.

How severe is CVE-2017-18603?

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

Is CVE-2017-18603 known to be exploited?

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

XSS in Postman-Smtp Project

CVE-2017-18603

The postman-smtp plugin through 2017-10-04 for WordPress has XSS via the wp-admin/tools.php?page=postman_email_log page parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-09-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.8th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Postman-Smtp Project

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

wordpress.org/plugins/postman-smtp/ (Third Party Advisory)
www.pluginvulnerabilities.com/2017/06/29/reflected-cross-site-scripting-xss-vul… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-18603?: CVE-2017-18603 is a medium-severity vulnerability in Postman-Smtp Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-09-10.
How severe is CVE-2017-18603?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2017-18603 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.