Security readout for executives and security teams
Plain-English summary
CVE-2021-36869 is a reflected cross-site scripting issue in the WordPress Ivory Search plugin through version 4.6.6. A successful attack could cause a victim’s browser to run attacker-controlled script in the site context, but the published CVSS vector indicates high privileges and user interaction are required.
Executive priority
Treat as a moderate web application risk. Prioritize quick inventory and plugin update during routine maintenance, with higher urgency for public WordPress sites that have many privileged users or untrusted administrators.
Technical view
The issue is CWE-79 reflected XSS affecting the Ivory Search WordPress plugin, versions <= 4.6.6. The vulnerable parameter is identified as post. CVSS 3.1 is 4.8 with network attack vector, low complexity, high privileges required, user interaction required, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to WordPress sites with Ivory Search installed at version 4.6.6 or earlier. Sites without this plugin, or running a version not covered by the affected range, are not indicated as affected by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector suggests exploitation is not anonymous drive-by; it requires high privileges plus victim interaction, which lowers urgency but does not remove risk on multi-user WordPress sites.
Researcher notes
Evidence is sufficient for product, affected version range, weakness class, vulnerable parameter, and CVSS context. The bundle does not include exploit proof, active exploitation, or a named fixed version, so remediation should follow current vendor and WordPress plugin guidance.
Mitigation direction
- Inventory WordPress sites for the Ivory Search plugin and its installed version.
- Update Ivory Search according to WordPress.org or vendor guidance.
- If the plugin is unnecessary, disable and remove it.
- Restrict high-privilege WordPress accounts to trusted administrators.
- Monitor vendor advisories for any fixed-version clarification.
Validation and detection
- Confirm whether Ivory Search is installed on each WordPress site.
- Verify installed versions are not 4.6.6 or earlier.
- Review WordPress administrative users with high privileges.
- Check logs for suspicious links or requests involving the post parameter.
- Confirm remediation by rechecking plugin inventory after updates.
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-2021-36869 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
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://wordpress.org/plugins/add-search-to-menu/#developersCVE reference · x_refsource_CONFIRM
- https://patchstack.com/database/vulnerability/add-search-to-menu/wordpress-ivory-search-plugin-4-6-6-reflected-cross-site-scripting-xss-vulnerabilityCVE 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.