Security readout for executives and security teams
Plain-English summary
Wordpress Simple Shop up to version 1.2 can reflect attacker-controlled input into a page. If a user follows a crafted link, malicious script could run in that user's browser. The known impact is limited confidentiality and integrity loss, not server takeover.
Executive priority
Treat as a moderate web application risk. It is not listed in KEV and needs user interaction, but WordPress plugin XSS can still affect administrators and customers. Address during normal vulnerability remediation, faster for public or business-critical WordPress sites.
Technical view
CVE-2021-38340 is a reflected cross-site scripting issue in the update_row parameter in includes/add_product.php. The CVSS 3.1 score is 6.1: network reachable, low complexity, no privileges, user interaction required, changed scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is limited to WordPress sites running Wordpress Simple Shop versions up to and including 1.2. The bundle does not identify affected CPEs, a fixed version, or deployment prevalence.
Exploitation context
The source bundle and KEV flag do not show known active exploitation. Exploitation requires user interaction, typically a victim following an attacker-controlled URL or visiting attacker-controlled content that reaches the vulnerable parameter.
Researcher notes
The evidence identifies CWE-79 reflected XSS in update_row and provides CVSS details. It does not provide a named fixed version, proof of exploitation, or detailed patch guidance. Avoid assuming exploit maturity beyond the advisory.
Mitigation direction
- Inventory WordPress sites for Wordpress Simple Shop installations.
- Remove or disable the plugin where it is not business-critical.
- Check vendor or Wordfence guidance for a fixed release before upgrading.
- Use a WordPress security control or WAF as compensating protection.
- Prioritize remediation on externally reachable WordPress sites with authenticated administrators.
Validation and detection
- Confirm whether Wordpress Simple Shop is installed and its version is 1.2 or earlier.
- Review plugin source or vendor advisory for handling of update_row in add_product.php.
- Check web logs for unusual requests referencing update_row.
- Verify remediation by confirming the vulnerable version is removed, disabled, or replaced.
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-2021-38340 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-2021-38340CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/webful-simple-grocery-shop/trunk/includes/add_product.php#L80CVE 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.