TI-2025-04189 Aliases CVE-2025-4691 GHSA-r4jv-p8qq-69jq

Authorization bypass in Syntactics, Inc. eaSYNC Booking – Hotels, Restaurants & Car…

LOW 30CWE-639Published 2025-05-31 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

The Free Booking Plugin for Hotels, Restaurants and Car Rentals – eaSYNC Booking plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.3.21 via the 'view_request_details' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to view the details of any booking request. The vulnerability was partially patched in versions 1.3.18 and 1.3.21.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00345 28th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Syntactics, Inc.	eaSYNC Booking – Hotels, Restaurants & Car Rentals	up to 1.3.21	—	No fix listed	CNA

eaSYNC Booking – Hotels, Restaurants & Car Rentals VendorSyntactics, Inc. Affected up to 1.3.21 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:syntacticsinc:easync::::::wordpress::*	before 1.3.22	Vulnerable	Syntacticsinc

cpe:2.3:a:syntacticsinc:easync:*:*:*:*:*:wordpress:*:* Versions before 1.3.22 Vulnerable ·Syntacticsinc

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-4691
2026-10-03 Alias added: GHSA-r4jv-p8qq-69jq

References

Patch 3

Advisory 1

https://www.wordfence.com/threat-intel/vulnerabilities/id/3c9953b3-dd09-4c80-be11-4daf3bbac720?source=cve

Other 1

https://plugins.trac.wordpress.org/browser/easync-booking/tags/1.3.17/easync.php#L4859

TI-2022-04562 Freemius SDK <= 2.4.2 - Missing Authorization Checks CVSS 3.1MEDIUM 6.3
TI-2025-23316 WordPress eaSYNC plugin <= 1.3.19 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences