Vulnerability-Lookup

CVE-2021-36888 (GCVE-0-2021-36888)

Vulnerability from cvelistv5 – Published: 2021-12-15 18:06 – Updated: 2026-04-28 16:07

Shadowserver Previdian

Title

WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise

Summary

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-28 16:16 UTC

CWE

CWE-284 - Improper Access Control

Assigner

Patchstack mitre root

References

2 references

URL	Tags
https://wordpress.org/plugins/image-hover-effects…	x_refsource_CONFIRM
https://patchstack.com/database/vulnerability/ima…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
Oxilab	Image Hover Effects Ultimate (WordPress plugin)	Affected: <= 9.6.1 , ≤ 9.6.1 (custom)	guessed

Date Public

2021-12-15 00:00

Credits

Vulnerability discovered by John Castro (Pagely)

Shadowserver

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 035c8b59-c7a9-4c7f-9801-383fbd6b1aea

Vulnerability ID: CVE-2021-36888

Status: Confirmed

Status Updated: 2026-07-19 00:00 UTC

Exploited: Yes

Characteristics

Severity: 98.0

Timestamps

First Seen: 2026-03-09

Asserted: 2026-03-09

Last Seen: 2026-07-19

Scope

Asset Exposure: ['internet-facing']

Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details

1D	1
Iot	no
Feed	Shadowserver Foundation honeypot/exploited-vulnerabilities
Type	http-scan
Class	cms
7D Avg	0
Vendor	Wordpress
30D Avg	1
90D Avg	2
Product	Wordpress Image Hover Effects Ultimate plugin
Cisa Kev	no
Connections	1
Observation Date	2026-07-19
Vulnerability Class	CVSS
Vulnerability Score	9.8
Vulnerability Severity	Critical

References

Created: 2026-06-30 09:23 UTC | Updated: 2026-07-21 01:02 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 8d4c36cd-5e87-441d-9089-ef2d5b5b045c

Vulnerability ID: CVE-2021-36888

Status: Confirmed

Status Updated: 2021-12-15 18:06 UTC

Exploited: Yes

Timestamps

First Seen: 2021-12-15

Asserted: 2021-12-15

Scope

Notes: KEVIntel entry: WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise | Affected: Oxilab / Image Hover Effects Ultimate (WordPress plugin) | CVSS: 9.8 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise
Vendor	Oxilab
Product	Image Hover Effects Ultimate (WordPress plugin)
Added Date	2021-12-15T18:06:58.000Z
Cvss Score	9.8
Epss Score	None
Cvss Severity	CRITICAL
Epss Percentile	None
Used In Malware	unknown
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	True

References

Created: 2026-06-23 14:06 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

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To clipboard

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CNVD-2021-103503

Vulnerability from cnvd - Published: 2021-12-30

Title

WordPress Image Hover Effects Ultimate存在未明漏洞

Description

WordPress是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress Image Hover Effects Ultimate插件9.6.1及之前版本存在安全漏洞，攻击者可利用该漏洞导致整个网站遭到破坏。

Severity

高

Patch Name

WordPress Image Hover Effects Ultimate存在未明漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://wordpress.org/plugins/image-hover-effects-ultimate/#developers

Reference

https://wordpress.org/plugins/image-hover-effects-ultimate/#developers

Impacted products

Name
WordPress Image Hover Effects Ultimate <=9.6.1

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-36888",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-36888"
    }
  },
  "description": "WordPress\u662fWordPress\uff08Wordpress\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u5957\u4f7f\u7528PHP\u8bed\u8a00\u5f00\u53d1\u7684\u535a\u5ba2\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u652f\u6301\u5728PHP\u548cMySQL\u7684\u670d\u52a1\u5668\u4e0a\u67b6\u8bbe\u4e2a\u4eba\u535a\u5ba2\u7f51\u7ad9\u3002\n\nWordPress Image Hover Effects Ultimate\u63d2\u4ef69.6.1\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u6574\u4e2a\u7f51\u7ad9\u906d\u5230\u7834\u574f\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://wordpress.org/plugins/image-hover-effects-ultimate/#developers",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-103503",
  "openTime": "2021-12-30",
  "patchDescription": "WordPress\u662fWordPress\uff08Wordpress\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u5957\u4f7f\u7528PHP\u8bed\u8a00\u5f00\u53d1\u7684\u535a\u5ba2\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u652f\u6301\u5728PHP\u548cMySQL\u7684\u670d\u52a1\u5668\u4e0a\u67b6\u8bbe\u4e2a\u4eba\u535a\u5ba2\u7f51\u7ad9\u3002\r\n\r\nWordPress Image Hover Effects Ultimate\u63d2\u4ef69.6.1\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u6574\u4e2a\u7f51\u7ad9\u906d\u5230\u7834\u574f\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "WordPress Image Hover Effects Ultimate\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "WordPress Image Hover Effects Ultimate \u003c=9.6.1"
  },
  "referenceLink": "https://wordpress.org/plugins/image-hover-effects-ultimate/#developers",
  "serverity": "\u9ad8",
  "submitTime": "2021-12-17",
  "title": "WordPress Image Hover Effects Ultimate\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

FKIE_CVE-2021-36888

Vulnerability from fkie_nvd - Published: 2021-12-15 19:15 - Updated: 2026-06-17 03:59

Shadowserver Previdian

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.

References

URL	Tags
audit@patchstack.com	https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise	Third Party Advisory
audit@patchstack.com	https://wordpress.org/plugins/image-hover-effects-ultimate/#developers	Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://wordpress.org/plugins/image-hover-effects-ultimate/#developers	Release Notes, Vendor Advisory

Impacted products

	Vendor	Product	Version
	blocksera	image_hover_effects	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Image Hover Effects Ultimate (WordPress plugin)",
          "vendor": "Oxilab",
          "versions": [
            {
              "lessThanOrEqual": "9.6.1",
              "status": "affected",
              "version": "\u003c= 9.6.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "audit@patchstack.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:blocksera:image_hover_effects:*:*:*:*:*:wordpress:*:*",
              "matchCriteriaId": "9395E290-2835-4C45-B914-F7B506B402EB",
              "versionEndExcluding": "9.6.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions \u003c= 9.6.1) WordPress plugin."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de actualizaci\u00f3n de opciones arbitrarias no autenticadas que conlleva a un compromiso total del sitio web detectada en el plugin Image Hover Effects Ultimate de WordPress (versiones anteriores a 9.6.1 incluy\u00e9ndola)"
    }
  ],
  "id": "CVE-2021-36888",
  "lastModified": "2026-06-17T03:59:34.980",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "source": "audit@patchstack.com",
        "type": "Secondary"
      },
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          "attackComplexity": "LOW",
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-28T16:16:29.147097Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-12-15T19:15:14.963",
  "references": [
    {
      "source": "audit@patchstack.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise"
    },
    {
      "source": "audit@patchstack.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://wordpress.org/plugins/image-hover-effects-ultimate/#developers"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://wordpress.org/plugins/image-hover-effects-ultimate/#developers"
    }
  ],
  "sourceIdentifier": "audit@patchstack.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "audit@patchstack.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-8FJW-GV37-439Q

Vulnerability from github – Published: 2021-12-16 00:00 – Updated: 2022-10-27 19:00

Details

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-36888"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306",
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-12-15T19:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions \u003c= 9.6.1) WordPress plugin.",
  "id": "GHSA-8fjw-gv37-439q",
  "modified": "2022-10-27T19:00:29Z",
  "published": "2021-12-16T00:00:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36888"
    },
    {
      "type": "WEB",
      "url": "https://patchstack.com/database/vulnerability/image-hover-effects-ultimate/wordpress-image-hover-effects-ultimate-plugin-9-6-1-unauthenticated-arbitrary-options-update-leading-to-full-website-compromise"
    },
    {
      "type": "WEB",
      "url": "https://wordpress.org/plugins/image-hover-effects-ultimate/#developers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-36888

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions <= 9.6.1) WordPress plugin.

Aliases

CVE-2021-36888

Aliases

CVE-2021-36888

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-36888",
    "description": "Unauthenticated Arbitrary Options Update vulnerability leading to full website compromise discovered in Image Hover Effects Ultimate (versions \u003c= 9.6.1) WordPress plugin.",
    "id": "GSD-2021-36888"
  },
  "gsd": {
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      "id": "GSD-2021-36888",
      "modified": "2023-12-13T01:23:16.293857Z",
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      "publishedDate": "2021-12-15T19:15Z"
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  }
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2021-36888 (GCVE-0-2021-36888)

Shadowserver

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Characteristics

Timestamps

Scope

Evidence

Honeypot In The Wild Attempts Confidence: 70% Source: shadowserver

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

CNVD-2021-103503

FKIE_CVE-2021-36888

GHSA-8FJW-GV37-439Q

GSD-2021-36888

Tags

Sightings

Nomenclature

Related by attack behaviour