CVE-2026-91050 (CVSS 4.3)

Description

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference / Missing Authorization in versions up to, and including, 5.7.2. This is due to the publicly reachable steps__start and steps__load_step routes accepting a params[presets][order_item_id] value that is copied verbatim into the booking object without verifying that the referenced order item belongs to the current customer, is a bundle item, is paid, or has remaining capacity — the is_bundle_scheduling() bundle discriminator is a mere !empty(order_item_id) truthiness check, and the code flow explicitly removes the customer and payment steps when this is truthy (the source even carries a TODO acknowledging the missing validation). This makes it possible for unauthenticated attackers to create approved appointments against other customers' order items and to read those customers' names, email addresses, and order codes returned in the booking confirmation.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-639 CWE-639

References

Other References

https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/controllers/steps_controller.php#L17 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/controllers/steps_controller.php#L341 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L1028 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L1281 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L2350 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L677 https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/models/booking_model.php#L842 https://www.wordfence.com/threat-intel/vulnerabilities/id/136f8e94-a09a-48c4-bea9-e8b21d3fd91f?source=cve

Frequently Asked Questions

What is CVE-2026-91050? +

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference / Missing Authorization in versions up to, and including, 5.7.2. This is due to the publicly reachable steps__start and steps__load_step routes accepting a params[presets][order_item_id] value that is copied verbatim into the booking object without verifying that the referenced order item belongs to the current customer, is a bundle item, is paid, or has remaining capacity — the is_bundle_scheduling() bundle discriminator is a mere !empty(order_item_id) truthiness check, and the code flow explicitly removes the customer and payment steps when this is truthy (the source even carries a TODO acknowledging the missing validation). This makes it possible for unauthenticated attackers to create approved appointments against other customers' order items and to read those customers' names, email addresses, and order codes returned in the booking confirmation. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-91050? +

CVE-2026-91050 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-91050? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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