CVE-2026-109217 (GCVE-0-2026-109217)

Vulnerability from cvelistv5 – Published: 2026-10-31 06:44 – Updated: 2026-10-31 06:44
VLAI
Title
PDF Invoices & Packing Slips for WooCommerce <= 5.16.5 - Unauthenticated Sensitive Information Exposure via Yearly-Reset Invoice Attachment Cache
Summary
The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.16.5 via the 'invoice_number (via document filename)' parameter. This makes it possible for unauthenticated attackers to extract another customer's complete invoice PDF — including billing identity, shipping address, private order notes, line items, prices, dates, order ID, and invoice number — delivered directly to the attacker's email as an order confirmation attachment. Exploitation requires the plugin's yearly invoice number reset option to be enabled, and the attacker's guest-checkout order must trigger a processing email within 60 seconds of a victim order that shares the same yearly-reset invoice number.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-524 - Use of Cache Containing Sensitive Information
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
wpovernight PDF Invoices & Packing Slips for WooCommerce Affected: 0 , ≤ 5.16.5 (semver)
guessed Create a notification for this product.
Credits
Santh
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "PDF Invoices \u0026 Packing Slips for WooCommerce",
          "vendor": "wpovernight",
          "versions": [
            {
              "lessThanOrEqual": "5.16.5",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Santh"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The PDF Invoices \u0026 Packing Slips for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.16.5 via the \u0027invoice_number (via document filename)\u0027 parameter. This makes it possible for unauthenticated attackers to extract another customer\u0027s complete invoice PDF \u2014 including billing identity, shipping address, private order notes, line items, prices, dates, order ID, and invoice number \u2014 delivered directly to the attacker\u0027s email as an order confirmation attachment. Exploitation requires the plugin\u0027s yearly invoice number reset option to be enabled, and the attacker\u0027s guest-checkout order must trigger a processing email within 60 seconds of a victim order that shares the same yearly-reset invoice number."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-524",
              "description": "CWE-524 Use of Cache Containing Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-31T06:44:22.823Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e68495ad-53ab-4c6b-aecc-1e4bfe34aa0d?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L253"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L239"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Documents/Invoice.php#L146"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L181"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3759839%40woocommerce-pdf-invoices-packing-slips\u0026new=3759839%40woocommerce-pdf-invoices-packing-slips"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-12T13:55:27.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-10-30T18:26:18.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "PDF Invoices \u0026 Packing Slips for WooCommerce \u003c= 5.16.5 - Unauthenticated Sensitive Information Exposure via Yearly-Reset Invoice Attachment Cache"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-109217",
    "datePublished": "2026-10-31T06:44:22.823Z",
    "dateReserved": "2026-10-12T13:39:37.950Z",
    "dateUpdated": "2026-10-31T06:44:22.823Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-109217",
      "date": "2026-11-02",
      "epss": "0.00256",
      "percentile": "0.17225"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "PDF Invoices \u0026 Packing Slips for WooCommerce",
                "vendor": "wpovernight",
                "versions": [
                  {
                    "lessThanOrEqual": "5.16.5",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@wordfence.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The PDF Invoices \u0026 Packing Slips for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.16.5 via the \u0027invoice_number (via document filename)\u0027 parameter. This makes it possible for unauthenticated attackers to extract another customer\u0027s complete invoice PDF \u2014 including billing identity, shipping address, private order notes, line items, prices, dates, order ID, and invoice number \u2014 delivered directly to the attacker\u0027s email as an order confirmation attachment. Exploitation requires the plugin\u0027s yearly invoice number reset option to be enabled, and the attacker\u0027s guest-checkout order must trigger a processing email within 60 seconds of a victim order that shares the same yearly-reset invoice number."
          }
        ],
        "id": "CVE-2026-109217",
        "lastModified": "2026-11-02T16:19:19.997",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "security@wordfence.com",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-10-31T07:16:34.220",
        "references": [
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Documents/Invoice.php#L146"
          },
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L181"
          },
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L239"
          },
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L253"
          },
          {
            "source": "security@wordfence.com",
            "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3759839%40woocommerce-pdf-invoices-packing-slips\u0026new=3759839%40woocommerce-pdf-invoices-packing-slips"
          },
          {
            "source": "security@wordfence.com",
            "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e68495ad-53ab-4c6b-aecc-1e4bfe34aa0d?source=cve"
          }
        ],
        "sourceIdentifier": "security@wordfence.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-524"
              }
            ],
            "source": "security@wordfence.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.