5.3

CVE-2026-87966: unknown easy appointments

CVSS: 5.3v3.1MediumDeferred
Published 18-09-2026Last modified 18-09-2026
Open JSON

Vulnerability summary

CVE-2026-87966 is a medium (CVSS 5.3) vulnerability in unknown easy appointments. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.6% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 4.0.2.2.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 18-09-2026
    Last modifiedVulnerability information updated.

Description

The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an ownership or authorization check on its unauthenticated appointment-reservation endpoint before updating an existing appointment identified by a request-supplied id, allowing unauthenticated attackers to overwrite, and through a follow-on cleanup delete, arbitrary appointments.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

+0.16 pp

From 0.15% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.30%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Unknown1 product
Wordpress1 product
  • easy-appointments≥ 4.0, ≤ 4.0.2.1 (fixed in 4.0.2.2)

2 vendors · 2 products

References

2 links