Security readout for executives and security teams
Plain-English summary
This flaw affects the WordPress Image Hover Effects Ultimate plugin through version 9.6.1. An unauthenticated attacker could change site options, which the source describes as leading to full website compromise. For affected public WordPress sites, this is urgent because no login or user interaction is required.
Executive priority
Treat affected public WordPress sites as an immediate remediation item. The business risk is full site takeover, content alteration, data exposure, or service disruption from a no-login attack path.
Technical view
CVE-2021-36888 is an unauthenticated arbitrary options update in Oxilab Image Hover Effects Ultimate for WordPress versions <= 9.6.1. CVSS 3.1 is 9.8, vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The listed weakness is CWE-284, improper access control.
Likely exposure
Known exposure is limited to WordPress sites running Image Hover Effects Ultimate versions <= 9.6.1. The source bundle lists no CPEs, so inventory should rely on WordPress plugin presence and version checks.
Exploitation context
The provided sources do not show CISA KEV listing or confirm active exploitation. Risk remains high because the flaw is unauthenticated, network reachable, low complexity, and described as enabling full website compromise.
Researcher notes
Evidence is strong for affected product, version range, severity, and vulnerability class. The source bundle does not include exploit details, proof of exploitation, or a named fixed release, so validation should stay focused on installed version and vendor guidance.
Mitigation direction
- Check the WordPress plugin page and Patchstack entry for vendor-confirmed fixed versions.
- Upgrade only to a version vendor sources identify as fixed.
- Disable or remove the plugin if a fixed version cannot be confirmed.
- Review site configuration for unauthorized option changes after exposure.
Validation and detection
- Inventory WordPress sites for Image Hover Effects Ultimate installations.
- Confirm installed plugin versions are greater than 9.6.1 or vendor-confirmed fixed.
- Check web application logs for unauthenticated requests to plugin-related endpoints.
- Review WordPress options and administrator accounts for unexpected changes.
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-284: 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-2021-36888 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://wordpress.org/plugins/image-hover-effects-ultimate/#developersCVE reference · x_refsource_CONFIRM
- https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromiseCVE 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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.