croixhaug Appointment Booking Calendar Plugin up to 1.6.11.5 on WordPress REST API Endpoint /wp-json/ssa/v1/async sleep resource consumption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in croixhaug Appointment Booking Calendar Plugin up to 1.6.11.5 on WordPress. The impacted element is the function sleep of the file /wp-json/ssa/v1/async of the component REST API Endpoint. Such manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-7493. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in croixhaug Appointment Booking Calendar Plugin up to 1.6.11.5 on WordPress. Affected by this issue is the function sleep of the file /wp-json/ssa/v1/async of the component REST API Endpoint. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to denial of service in all versions up to, and including, 1.6.11.5. This is due to a publicly accessible REST API endpoint (/wp-json/ssa/v1/async) that calls PHP's sleep() function on a user-supplied delay parameter without any rate limiting. This makes it possible for unauthenticated attackers to exhaust PHP worker processes, denying access to the site to legitimate users.

The weakness was shared by lucky_buddy. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-7493 since 04/30/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.6.11.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-6097) and EUVD (EUVD-2026-32036). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (Wordfence): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Appointment Booking Calendar Plugin 1.6.11.2

Timelineinfo

04/30/2026 CVE reserved
05/27/2026 +27 days Advisory disclosed
05/27/2026 +0 days VulDB entry created
05/29/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: wordfence.com
Researcher: lucky_buddy
Status: Confirmed

CVE: CVE-2026-7493 (🔒)
GCVE (CVE): GCVE-0-2026-7493
GCVE (VulDB): GCVE-100-365834
EUVD: 🔒
CNNVD: CNNVD-202605-6097 - WordPress plugin Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 资源管理错误漏洞

Entryinfo

Created: 05/27/2026 06:06
Updated: 05/29/2026 00:26
Changes: 05/27/2026 06:06 (69), 05/27/2026 07:01 (1), 05/29/2026 00:26 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!