Security readout for executives and security teams
Plain-English summary
CVE-2026-27390 is a high-severity account takeover issue in the WordPress WeDesignTech Ultimate Booking Addon plugin. The public record says versions through 1.0.1 are affected. A low-privileged authenticated user may be able to bypass authentication controls and gain control of accounts, creating confidentiality, integrity, and availability risk for affected sites.
Executive priority
Treat as urgent for WordPress sites running this booking plugin. The issue can affect account control and site integrity, but confirmed active exploitation is not shown in the provided sources. Prioritize inventory, temporary exposure reduction, and vendor-guided remediation.
Technical view
The vulnerability is classified as CWE-288, Authentication Bypass Using an Alternate Path or Channel. CVSS 3.1 is 8.8: network exploitable, low complexity, low privileges required, no user interaction, and high impact to confidentiality, integrity, and availability. The CVE description identifies package wedesigntech-ultimate-booking-addon through <= 1.0.1.
Likely exposure
Exposure is limited to WordPress sites using the WeDesignTech Ultimate Booking Addon plugin, especially versions 1.0.1 or earlier. The CVE data has some version metadata inconsistency, so teams should verify installed plugin identity and version directly in WordPress or asset inventory.
Exploitation context
The CVE indicates exploitation requires network access and a low-privileged account, but no user interaction. The source bundle does not show CISA KEV listing or another cited source confirming active exploitation. No exploit details should be assumed from the available evidence.
Researcher notes
Public data identifies CWE-288 and CVSS 8.8 with PR:L. The CVE description says affected through <= 1.0.1, while the structured affected entry is sparse and lists defaultStatus unaffected. Confirm with Patchstack/vendor before finalizing version-scoped detection logic.
Mitigation direction
- Identify all WordPress sites using WeDesignTech Ultimate Booking Addon.
- Check whether installed versions are 1.0.1 or earlier.
- Review vendor and Patchstack guidance for fixed versions or official mitigations.
- Disable or remove the plugin where it is not business-critical.
- Limit low-privileged account creation and access until remediated.
- Increase monitoring for account changes and suspicious logins.
Validation and detection
- Confirm plugin slug matches wedesigntech-ultimate-booking-addon.
- Record installed plugin version from WordPress administration or inventory tooling.
- Check CVE and Patchstack pages for updated remediation status.
- Review logs for unexpected privilege changes or account takeovers.
- Validate that unused or vulnerable plugin instances are removed or disabled.
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-288: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27390 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.