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VulnerabilityPublished

CVE-2026-15254: Simply Schedule Appointments (WordPress plugin) · Incorrect Authorization

Affects Simply Schedule Appointments (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 1.6.12.11 when convenient.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.6.12.11
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade Simply Schedule Appointments (WordPress plugin) to 1.6.12.11.

Affected software

ProductAffectedFixed in
Simply Schedule AppointmentsAffected
  • <1.6.12.11
Fixed in
  • 1.6.12.11

AI-suggested

If you cannot patch yet, restrict Contributor and higher roles from accessing the affected shortcode or disable the plugin if possible to prevent unauthorized data disclosure.

Description

Simply Schedule Appointments WordPress plugin versions before 1.6.12.11 contain an authorization flaw where users with Contributor role and above can access all customers' appointment data site-wide. This occurs because the plugin does not properly check capabilities on an administrative appointment-listing shortcode and fails to restrict results to authorized users only. The exposed data includes names, email addresses, phone numbers, and notes of customers.

References

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