CVE-2026-3367

MEDIUM

CVSS v3.1: 4.4 · EPSS: 0.0026 (16.9 percentile)

NetworkNo user interactionXSS

Source data as of:

At a glance

Severity
MEDIUM
CVSS
4.4 v3.1 · NVD
EPSS
0.0026 (16.9 percentile) · FIRST.org
CISA KEV
No
Type
XSS · NVD CWE
Attack conditions (CVSS vector)
NetworkNo user interaction · Source: NVD Vector
Published
2026-07-11 · Modified: 2026-07-11
References
Jump to references (8)

CVSS / EPSS / KEV

CVSS v3.1 4.4 / 10 MEDIUM Source: NVD
EPSS 0.0026 16.9 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

The Lockme OAuth2 calendars integration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'App ID' setting in all versions up to, and including, 2.11.0. This is due to insufficient input sanitization and output escaping. The register_setting() call on line 197 lacks a sanitize callback, allowing unsanitized data to be stored via update_option(). When the settings page is rendered, the stored value is echoed directly into an HTML input's value attribute without esc_attr() on line 212. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in the settings page that will execute whenever a user accesses the plugin settings page. Multiple fields are affected: App ID (client_id), App Secret (client_secret), Bookings ID prefix (id_prefix), and API domain (api_domain). This vulnerability is particularly impactful in WordPress multisite installations where administrators of individual sites should not be able to execute JavaScript affecting other users.

Record details

CVE ID
CVE-2026-3367
CVSS (v3.1)
4.4 (MEDIUM)
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Exploitability subscore
1.3
Impact subscore
2.7
EPSS
0.0026 (16.9 percentile) — 2026-07-12
CISA KEV
No
Weakness (CWE)
CWE-79
Affected configurations (CPE)
0
Published
2026-07-11
Modified
2026-07-11
Status
Received

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2026-13114 HIGH CVSS 7.2 CVE-2026-13378 HIGH CVSS 7.2 CVE-2026-6939 HIGH CVSS 7.2 CVE-2025-13968 MEDIUM CVSS 6.4

Published the same year

CVE-2026-57827 CRITICAL CVSS 10.0 CVE-2026-61447 CRITICAL CVSS 10.0 CVE-2026-61445 CRITICAL CVSS 9.9 CVE-2026-48939 CRITICAL CVSS 9.8 KEV
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