CVE-2021-36849 (GCVE-0-2021-36849)

Vulnerability from cvelistv5 – Published: 2022-07-20 18:35 – Updated: 2026-04-28 16:07
VLAI
Title
WordPress Social Media Share Buttons plugin <= 3.8.1 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability
Summary
Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in René Hermenau's Social Media Share Buttons plugin <= 3.8.1 at WordPress.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-20 19:28 UTC
CWE
  • CWE-79 - Cross-site Scripting (XSS)
References
Impacted products
Vendor Product Version CPE status
René Hermenau Social Media Share Buttons | MashShare (WordPress plugin) Affected: <= 3.8.1 , ≤ 3.8.1 (custom)
guessed Create a notification for this product.
Date Public
2022-06-16 00:00
Show details on NVD website

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                            "version_data": [
                              {
                                "version_affected": "\u003c=",
                                "version_name": "\u003c= 3.8.1",
                                "version_value": "3.8.1"
                              }
                            ]
                          }
                        }
                      ]
                    },
                    "vendor_name": "Ren\u00e9 Hermenau"
                  }
                ]
              }
            },
            "credit": [
              {
                "lang": "eng",
                "value": "Vulnerability discovered by Asif Nawaz Minhas (Patchstack Alliance)"
              }
            ],
            "data_format": "MITRE",
            "data_type": "CVE",
            "data_version": "4.0",
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Ren\u00e9 Hermenau\u0027s Social Media Share Buttons plugin \u003c= 3.8.1 at WordPress."
                }
              ]
            },
            "generator": {
              "engine": "Vulnogram 0.0.9"
            },
            "impact": {
              "cvss": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 3.4,
                "baseSeverity": "LOW",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "HIGH",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N",
                "version": "3.1"
              }
            },
            "problemtype": {
              "problemtype_data": [
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "CWE-79 Cross-site Scripting (XSS)"
                    }
                  ]
                }
              ]
            },
            "references": {
              "reference_data": [
                {
                  "name": "https://patchstack.com/database/vulnerability/mashsharer/wordpress-social-media-share-buttons-plugin-3-8-1-authenticated-stored-cross-site-scripting-xss-vulnerability",
                  "refsource": "CONFIRM",
                  "url": "https://patchstack.com/database/vulnerability/mashsharer/wordpress-social-media-share-buttons-plugin-3-8-1-authenticated-stored-cross-site-scripting-xss-vulnerability"
                },
                {
                  "name": "https://wordpress.org/plugins/mashsharer/#developers",
                  "refsource": "CONFIRM",
                  "url": "https://wordpress.org/plugins/mashsharer/#developers"
                }
              ]
            },
            "source": {
              "discovery": "EXTERNAL"
            }
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
        "assignerShortName": "Patchstack",
        "cveId": "CVE-2021-36849",
        "datePublished": "2022-07-20T18:35:29.806Z",
        "dateReserved": "2021-07-19T00:00:00.000Z",
        "dateUpdated": "2026-04-28T16:07:34.402Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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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.


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