CVE-2026-4333 (GCVE-0-2026-4333)

Vulnerability from cvelistv5 – Published: 2026-04-08 03:36 – Updated: 2026-04-08 16:37
VLAI?
Title
LearnPress <= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'skin' Shortcode Attribute
Summary
The LearnPress – WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'skin' attribute of the learn_press_courses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the 'skin' shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any esc_attr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Severity ?
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
thimpress LearnPress – WordPress LMS Plugin for Create and Sell Online Courses Affected: 0 , ≤ 4.3.3 (semver)
Create a notification for this product.
Credits
Djaidja Moundjid
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4333",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T15:07:21.799123Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-08T15:07:32.175Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "LearnPress \u2013 WordPress LMS Plugin for Create and Sell Online Courses",
          "vendor": "thimpress",
          "versions": [
            {
              "lessThanOrEqual": "4.3.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Djaidja Moundjid"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The LearnPress \u2013 WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027skin\u0027 attribute of the learn_press_courses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the \u0027skin\u0027 shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any esc_attr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-08T16:37:04.041Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/15fb0a26-e415-4ccb-b83d-d8f7b36bce66?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3494377%40learnpress\u0026new=3494377%40learnpress\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-17T14:23:25.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-04-07T15:19:06.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "LearnPress \u003c= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027skin\u0027 Shortcode Attribute"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-4333",
    "datePublished": "2026-04-08T03:36:07.559Z",
    "dateReserved": "2026-03-17T14:08:14.694Z",
    "dateUpdated": "2026-04-08T16:37:04.041Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-4333\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-04-08T05:16:06.683\",\"lastModified\":\"2026-04-08T21:26:35.910\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The LearnPress \u2013 WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027skin\u0027 attribute of the learn_press_courses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the \u0027skin\u0027 shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any esc_attr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\",\"baseScore\":6.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":2.7}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3494377%40learnpress\u0026new=3494377%40learnpress\u0026sfp_email=\u0026sfph_mail=\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/15fb0a26-e415-4ccb-b83d-d8f7b36bce66?source=cve\",\"source\":\"security@wordfence.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-4333\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-08T15:07:21.799123Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-08T15:07:25.714Z\"}}], \"cna\": {\"title\": \"LearnPress \u003c= 4.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via \u0027skin\u0027 Shortcode Attribute\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Djaidja Moundjid\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.4, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"thimpress\", \"product\": \"LearnPress \\u2013 WordPress LMS Plugin for Create and Sell Online Courses\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.3.3\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-03-17T14:23:25.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-04-07T15:19:06.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/15fb0a26-e415-4ccb-b83d-d8f7b36bce66?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L76\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.2.8/inc/Shortcodes/Courses/ListCoursesShortcode.php#L55\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3494377%40learnpress\u0026new=3494377%40learnpress\u0026sfp_email=\u0026sfph_mail=\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The LearnPress \\u2013 WordPress LMS Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027skin\u0027 attribute of the learn_press_courses shortcode in all versions up to and including 4.3.3. This is due to insufficient input sanitization and output escaping on the \u0027skin\u0027 shortcode attribute. The attribute value is used directly in an sprintf() call that generates HTML (class attribute and data-layout attribute) without any esc_attr() escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-04-08T16:37:04.041Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-4333\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-08T16:37:04.041Z\", \"dateReserved\": \"2026-03-17T14:08:14.694Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-04-08T03:36:07.559Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.