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CVE Record

CVE-2021-39319: duoFAQ - Responsive, Flat, Simple FAQ <= 1.4.8 Reflected Cross-Site Scripting

The duoFAQ - Responsive, Flat, Simple FAQ WordPess plugin is vulnerable to Reflected Cross-Site Scripting via the msg parameter found in the ~/duogeek/duogeek-panel.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.8.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a reflected cross-site scripting issue in the duoFAQ WordPress plugin. An attacker could trick a user into opening a crafted request that causes script to run in the user’s browser. Business risk is moderate because exploitation requires user interaction and affects confidentiality and integrity, not availability.

Executive priority

Treat as a moderate-priority website hygiene issue. It should not displace actively exploited critical vulnerabilities, but exposed WordPress sites should be checked and remediated during the next maintenance cycle, especially where administrators use the affected plugin.

Technical view

CVE-2021-39319 is CWE-79 reflected XSS in duoFAQ - Responsive, Flat, Simple FAQ through the msg parameter in duogeek/duogeek-panel.php. Sources state versions up to and including 1.4.8 are affected. CVSS 3.1 is 6.1: network reachable, low complexity, no privileges, user interaction required, changed scope.

Likely exposure

WordPress sites that have the duoFAQ - Responsive, Flat, Simple FAQ plugin installed at version 1.4.8 or earlier are the likely exposure. Sites not using this plugin are not indicated as affected by the provided sources.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The issue is reflected XSS, so practical abuse depends on getting a target user to interact with attacker-controlled content or a crafted request.

Researcher notes

The evidence identifies the vulnerable parameter and plugin file but does not provide a named fixed version in the supplied bundle. Avoid assuming exploit activity or remediation details beyond vendor and Wordfence guidance. The CVSS vector indicates user interaction is required.

Mitigation direction

  • Inventory WordPress sites for the duoFAQ plugin and installed version.
  • Check Wordfence and vendor guidance for an available fixed release.
  • Upgrade, remove, or disable affected plugin versions if no supported fix is available.
  • Prioritize sites where privileged users access WordPress frequently.
  • Consider temporary WAF filtering for suspicious msg parameter use.

Validation and detection

  • Confirm whether duoFAQ is installed on each WordPress site.
  • Verify whether installed versions are 1.4.8 or earlier.
  • Review plugin source or vendor notes for msg parameter sanitization changes.
  • Check web logs for unusual requests involving the msg parameter.
  • Validate remediation in a staging site before production rollout.
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-2021-39319 mapping review

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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-2021-39319Attack 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
duoFAQ - Responsive, Flat, Simple FAQduoFAQ - Responsive, Flat, Simple FAQ1.4.8Listed
Weakness

CWE details

CWE-79

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