WordPress Simply Schedule Appointments plugin <= 1.6.12.2 - Cross Site Scripting (XSS) vulnerability

published 2026-06-26 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39730

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.12.2 versions.

Patch / fix

fixed in 1

NSquared Simply Schedule Appointments 1.6.12.4

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-26)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected products

NSquared Simply Schedule Appointments

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-p
vdb-entry

Sources

CVE List CVE-2026-57317
NVD CVE-2026-57317

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary