Skip to content
Fencer Vulns
medium 4.8

CVE-2020-9371 json

Stored XSS exists in the Appointment Booking Calendar plugin before 1.3.35 for WordPress.

published 2020-03-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-30192

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
1
Exploit-DB

Summary

Stored XSS exists in the Appointment Booking Calendar plugin before 1.3.35 for WordPress. In the cpabc_appointments.php file, the Calendar Name input could allow attackers to inject arbitrary JavaScript or HTML.

Patch / fix

  • codepeople appointment_booking_calendar 1.3.35

Timeline

  1. Published
  2. First public exploit (EDB-48204)

Exploit prediction

3.30% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-48204 WordPress Plugin Appointment Booking Calendar 1.3.34 - CSV Injection webapps, 2020-03-12
  • drive.google.com https://drive.google.com/open?id=1NNcYPaJir9SleyVr4cSPqpI2LNM7rtx9 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/156694/WordPress-Appointment-Booking-Calendar-1.3.34-CSV-Injection.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

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.