Security readout for executives and security teams
Plain-English summary
This is a reflected XSS issue in Totalsoft's WordPress Event Calendar - Calendar plugin. A logged-in user with subscriber-level access could cause script to run in another user's browser if that user follows a crafted link. The published impact is limited integrity impact, not direct data theft or outage, but WordPress sites allowing user registration should treat it as actionable.
Executive priority
Schedule remediation in the normal vulnerability management cycle, sooner for public sites with open registration. This is not described as actively exploited, but it can affect site integrity and user trust.
Technical view
CVE-2022-36390 describes authenticated subscriber+ reflected XSS in Event Calendar - Calendar <= 1.4.6, mapped to CWE-79. CVSS 3.1 is 4.1: network access, low complexity, low privileges, required user interaction, changed scope, and low integrity impact. Sources do not provide exploit details, a confirmed fixed version, or active exploitation evidence.
Likely exposure
Likely exposure is WordPress sites with the Totalsoft Event Calendar - Calendar plugin installed at version 1.4.6 or earlier, especially sites with subscriber registration or many low-privilege accounts.
Exploitation context
The bundle does not show CISA KEV listing or any cited active exploitation. Exploitation requires an authenticated subscriber-level user and a separate user interaction, which lowers urgency compared with unauthenticated XSS but still matters for public WordPress sites.
Researcher notes
Evidence is limited to CVE metadata and vendor/reference pages. Do not assume a fixed version from the bundle alone. Validation should focus on installed version, authentication model, and whether the plugin remains required.
Mitigation direction
- Inventory WordPress sites for the calendar-event plugin and installed version.
- Update the plugin if vendor guidance identifies a fixed release.
- Disable or remove the plugin where it is not business-critical.
- Restrict unnecessary subscriber registration and review low-privilege user accounts.
- Monitor Patchstack and WordPress plugin pages for remediation guidance.
Validation and detection
- Confirm whether the plugin version is 1.4.6 or earlier.
- Check whether public or customer subscriber accounts can log in.
- Use a safe vulnerability scanner that identifies CVE-2022-36390 exposure.
- Review recent WordPress changes involving this plugin and low-privilege accounts.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2022-36390 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
- 4.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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:L/UI:R/S:C/C:N/I:L/A:N2.31.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/vulnerability/calendar-event/wordpress-event-calendar-calendar-plugin-1-4-6-authenticated-reflected-cross-site-scripting-xss-vulnerabilityCVE reference · x_refsource_CONFIRM
- https://wordpress.org/plugins/calendar-event/#developersCVE reference · x_refsource_CONFIRM
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.