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CVE Record

CVE-2023-6953: PDF Generator For Fluent Forms <= 1.1.7 - Cross-Site Scripting

The PDF Generator For Fluent Forms – The Contact Form Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the header, PDF body and footer content parameters in all versions up to, and including, 1.1.7 due to insufficient input sanitization and output escaping. This makes it possible for attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploitation level depends on who is granted the right to create forms by an administrator. This level can be as low as contributor, but by default is admin.

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-6953 is a stored cross-site scripting issue in the WordPress PDF Generator For Fluent Forms plugin through version 1.1.7. A permitted form creator could save script content into PDF header, body, or footer settings, causing it to run when the injected page is accessed.

Executive priority

Treat this as a moderate web application risk. It is not presented as broadly exploited, but it can create account-trust and session exposure on affected WordPress sites, especially where non-admin users can create forms.

Technical view

The plugin insufficiently sanitizes input and escapes output for PDF header, body, and footer content parameters. The CVSS 3.1 score is 4.9 with network attack vector, low privileges, high complexity, changed scope, and limited confidentiality and integrity impact. CWE-79 applies.

Likely exposure

Exposure is limited to WordPress sites using PDF Generator For Fluent Forms at version 1.1.7 or older. Risk depends heavily on who can create or edit forms; the source says this may be as low as contributor, but is admin by default.

Exploitation context

The provided sources do not cite active exploitation, and the CVE is not marked KEV. Practical abuse requires access to an account with permission to create or modify relevant forms, then a user accessing affected rendered content.

Researcher notes

Key uncertainty is fixed-version detail: the bundle references a WordPress.org changeset but does not explicitly name a patched release. Avoid assuming exposure unless the plugin and version are confirmed. Focus validation on role permissions and stored PDF content fields.

Mitigation direction

  • Upgrade the plugin beyond version 1.1.7 when vendor guidance confirms a fixed release.
  • Review WordPress.org plugin guidance and the referenced changeset before approving remediation.
  • Restrict form creation and editing privileges to trusted administrators only.
  • Audit existing PDF header, body, and footer content for unexpected script-like content.
  • Remove unused or unmaintained PDF generation plugins from WordPress sites.

Validation and detection

  • Inventory WordPress sites for PDF Generator For Fluent Forms installations and versions.
  • Confirm whether any installed version is 1.1.7 or older.
  • Review roles allowed to create or edit Fluent Forms and related PDF settings.
  • Inspect stored PDF header, body, and footer fields for suspicious active content.
  • Verify remediation using vendor release notes or WordPress.org plugin history.
Prepared
Confidence
medium
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-2023-6953 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
4.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N1.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2023-6953Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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
wpmanageninjaFluent PDF Generator0unaffected
Weakness

CWE details

CWE-79

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

CWE-79 · source CWE mapping

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.

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