What is CVE-2017-17780?

CVE-2017-17780 is a medium-severity vulnerability in Mediaburst Booking Calendar Sms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-12-20.

How severe is CVE-2017-17780?

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

Is CVE-2017-17780 known to be exploited?

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

XSS in Mediaburst Booking Calendar Sms

CVE-2017-17780

The Clockwork SMS clockwork-test-message.php component has XSS via a crafted "to" parameter in a clockwork-test-message request to wp-admin/admin.php. This component code is found in the following WordPress plugins: Clockwork Free and Paid SMS Notifications 2.0.3, Two-Factor Authentication - Clockwork SMS 1.0.2, Booking Calendar - Clockwork SMS 1.0.5, Contact Form 7 - Clockwork SMS 2.3.0, Fast Secure Contact Form - Clockwork SMS 2.1.2, Formidable - Clockwork SMS 1.0.2, Gravity Forms - Clockwork SMS 2.2, and WP e-Commerce - Clockwork SMS 2.0.5.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-12-20 · 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 (59.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% 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

Mediaburst Booking Calendar Sms — versions 1.0.5
Mediaburst Clockwork Sms Notfications — versions 2.0.3
Mediaburst Contact Form 7 Sms — versions 2.3.0
Mediaburst Fast Secure Contact Form Sms — versions 2.1.2
Mediaburst Formidable — versions 1.0.2
Mediaburst Gravity Forms — versions 2.2
Mediaburst Two-Factor Authentication — versions 1.0.2
Mediaburst Wp E-Commerce — versions 2.0.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

packetstormsecurity.com/files/145469/Clockwork-SMS-Cross-Site-Scripting.html (Exploit, VDB Entry, Third Party Advisory, Issue Tracking)
plugins.trac.wordpress.org/changeset/1781424/clockwork-two-factor-authenticatio… (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-17780?: CVE-2017-17780 is a medium-severity vulnerability in Mediaburst Booking Calendar Sms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-12-20.
How severe is CVE-2017-17780?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2017-17780 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.