Security readout for executives and security teams
Plain-English summary
CVE-2021-38318 affects the 3D Cover Carousel WordPress plugin through reflected cross-site scripting. An attacker could trick a user into opening a crafted request and run script in that user’s browser context. The issue is medium severity because it needs user interaction but can still expose session data or alter page actions.
Executive priority
Treat this as a moderate web risk. It is not documented as actively exploited in the provided sources, but public WordPress exposure and administrator interaction make cleanup worthwhile during the next vulnerability remediation cycle.
Technical view
The vulnerability is CWE-79 reflected XSS in the id parameter handled by cover-carousel.php. Sources state versions up to and including 1.0 are vulnerable. CVSS 3.1 is 6.1 with network access, low complexity, no privileges, required user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to WordPress sites running the 3D Cover Carousel plugin version 1.0 or earlier. Public-facing WordPress sites are the main concern, especially where authenticated administrators or editors may follow external links while logged in.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The likely attack pattern is social engineering: a victim must open a maliciously crafted URL. Successful exploitation affects the victim’s browser session, not direct server code execution.
Researcher notes
Evidence supports reflected XSS only in the named plugin and parameter. Do not broaden scope to other carousel plugins. No fixed version is identified in the bundle, so remediation should rely on vendor guidance, disabling, or removal rather than assumed patch availability.
Mitigation direction
- Inventory WordPress sites for 3D Cover Carousel version 1.0 or earlier.
- Check vendor or WordPress plugin guidance for a maintained fixed release.
- Disable or remove the plugin if no fixed version is available.
- Prioritize sites where administrators use the plugin while logged in.
- Use browser security headers where feasible to reduce XSS impact.
Validation and detection
- Confirm whether the plugin is installed and enabled on each WordPress site.
- Record installed plugin versions and compare against version 1.0 or earlier.
- Review application logs for unusual requests to cover-carousel.php using the id parameter.
- Use non-destructive XSS scanning in staging or an approved test window.
- Verify remediation by confirming the vulnerable plugin version is absent.
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-2021-38318 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38318CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/3d-cover-carousel/trunk/cover-carousel.php?rev=1522904#L733CVE reference · x_refsource_MISC
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.