CVE.org (no NVD analysis yet)· CNA Wordfence

CVE-2026-109369: WP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation via 'user_permission' Parameter via Cross-Form Nonce Re

Noroxi assessment

Priority: Monitor (action score 27/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
No fixed version is recorded, but the references include a patch (commit or PR) link.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. See the fix and affected versions sections below.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to grant themselves and arbitrary other users edit access to every booking form on the site by overwriting the user_permission meta that governs the plugin's own access-control list. Exploitation requires the attacker to have already been delegated edit rights on at least one booking form, as this delegation both downgrades the submenu capability to 'read' (making the edit page accessible) and allows them to harvest a valid wpbs_edit_form nonce that will pass validation against any other form_id.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded

Broken access control (IDOR)

EUVD-2026-103226

Published: Oct 17, 2026
Updated: Oct 19, 2026
EPSS: 0.2% · 16th percentile
CWE: CWE-862

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 27 / 40 · 6.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Wordfence: 6.8; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Is WP Booking System – Booking Calendar on your site?

WP Lens reads your site's plugin, theme and WordPress versions from the outside and matches them to known vulnerabilities. Works without an account.

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Wordfence). Independent of NVD's CPE analysis and usually ahead of it.

murgroland WP Booking System – Booking Calendar
- up to and including 2.1.0.3affected · semver

Same product

murgroland: all records

Other highest-scoring records for the same primary product.

CVE-2026-116557WP Booking System <= 2.1.0.5 - Missing Authorization to Unauthenticated Arbitrary Calendar Note Deletion via wpbs_calendar_remove_note AJAX Action
36Monitor
CVE-2026-108123WP Booking System <= 2.1.0.3 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via 'wpbs_action=email_logs' Action
30Monitor
CVE-2026-109368WP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via wpbs_refresh_calendar_editor AJAX action
26Monitor

Published before and after this one in the same product

← EarlierCVE-2026-107712Oct 10, 2026 · WP Booking System <= 2.1.0.1 - Authenticated (Subscriber+) SQL Injection via 'current_month' Parameter
26Monitor
← EarlierCVE-2026-111178Oct 16, 2026 · WP Booking System <= 2.1.0.1 - Authenticated (Administrator+) SQL Injection via 'orderby' Parameter
19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

plugins.trac.wordpress.orgchangeset 3750120

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Wordfence PRISMfinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-11655714 days apartWP Booking System <= 2.1.0.5 - Missing Authorization to Unauthenticated Arbitrary Calendar Note Deletion via wpbs_calendar_remove_note AJAX Action
36Monitor
CVE-2026-1081230 days apartWP Booking System <= 2.1.0.3 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via 'wpbs_action=email_logs' Action
30Monitor
CVE-2026-1093680 days apartWP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via wpbs_refresh_calendar_editor AJAX action
26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).