Vulnerability-Lookup

GHSA-QG2P-54PJ-CHVP

Vulnerability from github – Published: 2026-08-20 06:32 – Updated: 2026-08-20 06:32

Details

The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint's nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access — including Contributors — making the absent upload_files check the sole barrier to exploitation.

Severity

5.3 (Medium)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-17153"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-20T06:16:58Z",
    "severity": "MODERATE"
  },
  "details": "The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint\u0027s nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access \u2014 including Contributors \u2014 making the absent upload_files check the sole barrier to exploitation.",
  "id": "GHSA-qg2p-54pj-chvp",
  "modified": "2026-08-20T06:32:27Z",
  "published": "2026-08-20T06:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17153"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L1077"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L604"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Gutenberg.php#L118"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L325"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L474"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3654622%40sg-ai-studio\u0026new=3654622%40sg-ai-studio"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/6280f40e-2998-43d4-a78f-b393e4f36df5?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-17153 (GCVE-0-2026-17153)

Vulnerability from cvelistv5 – Published: 2026-08-20 05:30 – Updated: 2026-08-20 15:26

Title

AI Agent by SiteGround <= 1.2.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Upload via /generate-content REST Endpoint

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 15:04 UTC

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence mitre root

References

7 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/sg-ai-…
https://plugins.trac.wordpress.org/browser/sg-ai-…
https://plugins.trac.wordpress.org/browser/sg-ai-…
https://plugins.trac.wordpress.org/browser/sg-ai-…
https://plugins.trac.wordpress.org/browser/sg-ai-…
https://plugins.trac.wordpress.org/changeset?repo…

Impacted products

1 product

Vendor	Product	Version
siteground	AI Agent by SiteGround	Affected: 0 , ≤ 1.2.7 (semver)

Credits

Wordfence PRISM

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-17153",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-20T15:04:34.974688Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T15:26:27.410Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "AI Agent by SiteGround",
          "vendor": "siteground",
          "versions": [
            {
              "lessThanOrEqual": "1.2.7",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Wordfence PRISM"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint\u0027s nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access \u2014 including Contributors \u2014 making the absent upload_files check the sole barrier to exploitation."
        }
      ],
      "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-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T05:30:45.341Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/6280f40e-2998-43d4-a78f-b393e4f36df5?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L474"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Rest.php#L325"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L1077"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Helper/Helper.php#L604"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/sg-ai-studio/tags/1.2.6/core/Rest/Gutenberg.php#L118"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3654622%40sg-ai-studio\u0026new=3654622%40sg-ai-studio"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-03T08:03:45.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-19T17:11:18.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "AI Agent by SiteGround \u003c= 1.2.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Upload via /generate-content REST Endpoint"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-17153",
    "datePublished": "2026-08-20T05:30:45.341Z",
    "dateReserved": "2026-07-24T17:36:50.811Z",
    "dateUpdated": "2026-08-20T15:26:27.410Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.