LiveActive security incident?Get immediate response
CVE Record

CVE-2023-0143: Send PDF for Contact Form 7 < 0.9.9.2 - Contributor+ Stored XSS via Shortcode

The Send PDF for Contact Form 7 WordPress plugin before 0.9.9.2 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

MediumCVSS 5.4Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This affects WordPress sites using Send PDF for Contact Form 7 before 0.9.9.2. A lower-privileged contributor could save malicious script through shortcode attributes, potentially affecting an administrator who views the content. The business risk is account compromise or site changes after admin interaction, not direct unauthenticated takeover.

Executive priority

Treat as a near-term WordPress hygiene issue. Prioritize sites with many contributors, external authors, or shared publishing workflows, because the path to impact runs through authenticated content creation and administrator interaction.

Technical view

The plugin failed to validate and escape some shortcode attributes before rendering them back into pages. This is stored XSS, CWE-79, with CVSS 3.1 score 5.4. Attackers need authenticated contributor-level access and victim interaction. Scope is changed, with limited confidentiality and integrity impact and no availability impact stated.

Likely exposure

Exposure is most likely on WordPress sites running Send PDF for Contact Form 7 below 0.9.9.2 with contributor or similar low-privilege posting rights enabled.

Exploitation context

The source bundle includes a WPScan entry tagged with exploit, but it does not state active exploitation. CISA KEV status is false. Practical exploitation depends on contributor-level access and a higher-privileged user viewing affected rendered content.

Researcher notes

Evidence identifies stored XSS through unescaped shortcode attributes in versions before 0.9.9.2. The provided affected vendor metadata is incomplete, so rely on product name, version boundary, CVSS vector, CWE-79, and WPScan/CVE records when mapping exposure.

Mitigation direction

  • Update Send PDF for Contact Form 7 to 0.9.9.2 or later.
  • Restrict contributor-level posting access until affected sites are patched.
  • Review existing posts and pages using the plugin shortcode.
  • Follow plugin vendor and WPScan guidance for any additional cleanup.
  • Limit administrator browsing of untrusted contributor content before remediation.

Validation and detection

  • Inventory WordPress sites using Send PDF for Contact Form 7.
  • Confirm installed plugin versions are 0.9.9.2 or later.
  • Review contributor, author, and editor accounts for unnecessary access.
  • Check content using plugin shortcodes for unexpected attributes.
  • Validate in staging that shortcode output is escaped after updating.
Prepared
Confidence
medium
Sources
3

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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2023-0143 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
2Source 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
5.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2023-0143Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
UnknownSend PDF for Contact Form 70unaffected
Weakness

CWE details

CWE-79

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