Security readout for executives and security teams
Plain-English summary
CVE-2026-22351 is a high-severity access-control issue in the WordPress WP FullCalendar plugin up to version 1.6. Public sources indicate an unauthenticated network attacker may access information they should not. The supplied sources do not identify active exploitation or a specific fixed version.
Executive priority
Prioritize identification this week for public WordPress sites. Treat confirmed vulnerable installations as high priority because the issue may expose confidential data without authentication. Urgency increases if the plugin supports public event data workflows or sensitive calendars.
Technical view
The issue is CWE-862 Missing Authorization in wp-fullcalendar. CVSS 3.1 is 7.5: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. The documented impact is confidentiality only, with no integrity or availability impact in the CVSS vector.
Likely exposure
Exposure is likely limited to WordPress sites running the WP FullCalendar plugin at version 1.6 or earlier. Internet-facing WordPress sites are the main concern. Organizations not using this plugin are not affected based on the supplied sources.
Exploitation context
The CVSS vector indicates remote, unauthenticated, low-complexity exploitation without user interaction. However, the source bundle does not include exploit details, observed exploitation, or vulnerable endpoint information. The CVE is not marked as CISA KEV in the provided data.
Researcher notes
Evidence is limited to the CVE record and Patchstack reference. The bundle states affected versions through <=1.6, while the structured affected entry is sparse. No patch version, exploit proof, or active exploitation signal is provided. Validate findings against live vendor/Patchstack updates before closure.
Mitigation direction
- Inventory WordPress sites for the wp-fullcalendar plugin and record installed versions.
- If version is 1.6 or earlier, check Patchstack and vendor guidance for remediation.
- If no fix is available, consider disabling or removing the plugin where business impact permits.
- Monitor official CVE and Patchstack entries for updated fix or exploitation information.
Validation and detection
- Confirm whether wp-fullcalendar is installed on each WordPress site.
- Compare installed plugin versions against the affected range: up to and including 1.6.
- Review web exposure of affected WordPress sites, especially public-facing instances.
- Document compensating controls if the plugin cannot be removed or updated immediately.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-22351 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
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 Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.