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CVE Record

CVE-2021-38347: Custom Website Data <= 2.2 Reflected Cross-Site Scripting

The Custom Website Data WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the id parameter found in the ~/views/edit.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.2.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-38347 is a reflected cross-site scripting flaw in the Custom Website Data WordPress plugin through version 2.2. A victim must interact with attacker-controlled input, such as a crafted link. Successful abuse could run script in the victim's browser and affect confidentiality or integrity within that session.

Executive priority

Treat this as a moderate WordPress hygiene issue, not an emergency unless the plugin is deployed on sensitive or heavily administered sites. Prioritize inventory and upgrade or removal.

Technical view

The issue is CWE-79 reflected XSS through the id parameter in ~/views/edit.php in Custom Website Data <= 2.2. The CVSS 3.1 score is 6.1, with network attack vector, low complexity, no attacker privileges, required user interaction, changed scope, and low confidentiality and integrity impact.

Likely exposure

Exposure is limited to WordPress sites running the Custom Website Data plugin at version 2.2 or earlier. Risk is higher where vulnerable plugin pages are reachable by users likely to open attacker-supplied links.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation evidence. Exploitation requires user interaction and depends on reflected script execution through the vulnerable id parameter.

Researcher notes

Evidence supports reflected XSS in the id parameter of views/edit.php for plugin versions up to 2.2. The bundle does not name a fixed version, exploit campaign, or confirmed patch; verify current vendor guidance before asserting remediation specifics.

Mitigation direction

  • Inventory WordPress sites for Custom Website Data plugin usage.
  • Remove the plugin if it is unused or business unnecessary.
  • Check vendor or Wordfence guidance for a fixed version before upgrading.
  • Prioritize updates or removal on externally administered WordPress sites.
  • Use standard WordPress hardening and least-privilege admin access controls.

Validation and detection

  • Confirm installed plugin versions are not 2.2 or earlier.
  • Review the referenced edit.php handling for proper output escaping.
  • Use safe staging validation to confirm id output is context-encoded.
  • Check security scanner results for reflected XSS findings on affected sites.
  • Document remediation status for every WordPress instance.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · medium confidence lookup

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.

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cve · low confidence lookup

CVE-2021-38347 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2021-38347Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Custom Website DataCustom Website Data2.2Listed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.