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VulnerabilityPublished Updated

CVE-2026-16541: Simply Schedule Appointments (WordPress plugin) · Information Exposure

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 1.6.12.17 when convenient.

Data as of 12 Nov 2026, 23:24 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 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.6.12.17
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 15 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 13 Nov 2026.

What to do

Upgrade Simply Schedule Appointments (WordPress plugin) to 1.6.12.17.

Affected software

ProductAffectedFixed in
Simply Schedule AppointmentsAffected
  • <1.6.12.17
Fixed in
  • 1.6.12.17

AI-suggested

If you cannot patch yet, restrict staff user roles from accessing the vulnerable REST endpoints if possible, or limit plugin usage to trusted users.

Description

The Simply Schedule Appointments WordPress plugin before 1.6.12.17 does not restrict the user records returned by some of its REST endpoints to those the requester is entitled to see, allowing users with a low-privileged staff role to disclose the names and email addresses of arbitrary registered users.

References

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