Security readout for executives and security teams
Plain-English summary
CVE-2026-1920 affects the Booktics WordPress booking plugin through version 1.0.16. A missing authorization check can allow an unauthenticated attacker to install Booktics addon plugins. The documented impact is limited integrity change, not data theft or site takeover in the cited scoring.
Executive priority
Treat as a timely WordPress plugin hygiene issue. Prioritize internet-facing booking sites and customer-service portals, but this is not currently evidenced as a critical emergency because cited impact is limited and no active exploitation is reported.
Technical view
The flaw is CWE-306, missing authentication/authorization, in Extension_Controller::update_item_permissions_check. Public records rate it CVSS 5.3: network exploitable, low complexity, no privileges, no user interaction, unchanged scope, low integrity impact only. WordPress Trac shows related code and a changeset for the affected controller.
Likely exposure
Exposure is limited to WordPress sites using Booktics, Booking Calendar for Appointments and Service Businesses, versions up to and including 1.0.16. Sites not using this plugin are not affected by this CVE.
Exploitation context
The CVE record says unauthenticated attackers can install addon plugins. The vulnerability is not listed in CISA KEV, and the provided sources do not claim active exploitation or public weaponization.
Researcher notes
Key review point is the permission callback for addon extension updates in Extension_Controller. The public Trac references show affected code around version 1.0.15 and a later changeset. Sources do not provide exploit details, active exploitation evidence, or a clearly named fixed release.
Mitigation direction
- Inventory WordPress sites for the Booktics plugin and its installed version.
- If Booktics is at or below 1.0.16, check the vendor or WordPress.org for updated guidance.
- Apply an available Booktics update beyond the affected versions if provided by the vendor.
- Restrict plugin management and monitor unexpected Booktics addon installations.
- If no update is available, evaluate disabling Booktics until vendor guidance is clear.
Validation and detection
- Confirm whether Booktics is installed on each WordPress site.
- Record the installed Booktics version and compare it with <= 1.0.16.
- Review administrative logs for unexpected Booktics addon installation activity.
- Check WordPress plugin repository notes and the referenced changeset for remediation status.
- Validate that any deployed update includes the authorization check change.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-1920 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ab051f4a-030a-44aa-8cbf-665c6c6d31a7?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/booktics/tags/1.0.15/core/extensions/controllers/extension-controller.php#L110CVE reference
- https://plugins.trac.wordpress.org/changeset/3477898/booktics/trunk/core/extensions/controllers/extension-controller.phpCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.