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01 Record

CVE-2026-59523

WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability

MediumPUBLISHEDCNA: Patchstack
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

02 Description

WordPress Simply Schedule Appointments plugin <= 1.6.11.11 - Broken Access Control vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.26% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 18.3% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-10-24.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-13 08:41Z3 MO AGO
Last updated
2026-10-09 16:53Z20 DAYS AGO
Reserved
2026-07-05
Assigning CNA
Patchstack
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
Data version
5.2
Document digest
49b8eeaa5e78beb0eb109d2d19e7a50057b47802540b9def57b11cb763b5a253

05 Affected products

VendorProductVersionsPlatforms
NSquaredSimply Schedule Appointments0 to 1.6.11.11—

06 References

07 Remediation

Update the WordPress Simply Schedule Appointments plugin to the latest available version (at least 1.6.12.0).