Security readout for executives and security teams
Plain-English summary
This issue lets a logged-in WordPress user with author-level or higher access store malicious script content through the Easy Pricing Tables plugin. The risk is moderate because attacker privileges and user interaction are required, but successful abuse could affect visitors or administrators who view the stored content.
Executive priority
Treat as a moderate-priority web risk. It is not currently evidenced as actively exploited, but WordPress sites with many content authors should remediate promptly because stored XSS can affect trusted users and site visitors.
Technical view
CVE-2021-36866 is an authenticated stored XSS vulnerability in Fatcat Apps Easy Pricing Tables for WordPress versions 3.1.2 and earlier. CVSS 3.1 is 4.8: network reachable, low complexity, high privileges required, user interaction required, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to WordPress sites using Easy Pricing Tables version 3.1.2 or earlier, especially where author-level accounts are broadly assigned or less trusted contributors can edit pricing table content.
Exploitation context
The source bundle does not show active exploitation, and this CVE is not marked as KEV. Abuse requires authenticated author-or-higher access and a victim viewing affected stored plugin content.
Researcher notes
Evidence identifies affected versions and privilege requirements, but the supplied bundle does not name a fixed version or detailed root cause. Avoid assuming exploit availability or patch specifics beyond vendor and Patchstack guidance.
Mitigation direction
- Inventory WordPress sites for Easy Pricing Tables plugin usage.
- Check vendor and Patchstack guidance for the fixed or recommended version.
- Upgrade the plugin if a vendor-supported fixed release is available.
- Disable or remove the plugin if remediation cannot be verified.
- Restrict author-level and higher WordPress roles to trusted users only.
Validation and detection
- Confirm whether Easy Pricing Tables is installed on each WordPress site.
- Record installed plugin versions and flag versions 3.1.2 or earlier.
- Review author-or-higher user assignments for unnecessary access.
- Check pricing table content for unexpected script-like or suspicious markup.
- Verify remediation against vendor or Patchstack release guidance.
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-2021-36866 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/easy-pricing-tables/#developersCVE reference · x_refsource_CONFIRM
- https://patchstack.com/database/vulnerability/easy-pricing-tables/wordpress-easy-pricing-tables-plugin-3-1-2-authenticated-stored-cross-site-scripting-xss-vulnerabilityCVE 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.