Vulnerability · CVE-2026-103304
eaSYNC < 1.3.31 - Unauthenticated Cancellation Request Creation and Email Template Update
Published Oct 15, 2026 · catalog updated Oct 15, 2026 · Unknown eaSYNC Booking
Check if you run it
No confirmed exploitation is on record for CVE-2026-103304. EPSS is 0.22%. Act only if a listed version of Unknown eaSYNC Booking is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium5.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.22%
- Remediation
- Version ranges on file
- Affected products
- stated eaSYNC Booking · vendor Unknown eaSYNC Booking
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the content of the emails the site sends.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- stated eaSYNC Booking< 1.3.31
- vendor Unknown eaSYNC Bookingversion unspecified
How to fix CVE-2026-103304
Recommended remediation
Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-103304. EPSS is 0.22%. Act only if a listed version of Unknown eaSYNC Booking is installed.
Which versions are affected?
Compare what you have installed with eaSYNC Booking < 1.3.31. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-862: Missing Authorization. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 15, 2026 · NIST NVD
Detected
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the content of the emails the site sends.
Oct 15, 2026 · NIST NVD
Updated
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the content of the emails the site sends.
Oct 15, 2026 · NIST NVD
Updated
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the content of the emails the site sends.
Sources
- CIRCL Vulnerability LookupVulnerability recordCVE-2026-103304
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the con
vulnerability.circl.lu - CVE.orgVulnerability recordCVE-2026-103304
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-103304
30-day exploitation probability 0.2%
first.org - NIST NVDVulnerability recordCVE-2026-103304
The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions, allowing unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the co
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.