Vulnerability-Lookup

GHSA-9C4X-WWXM-PWW8

Vulnerability from github – Published: 2026-03-11 09:31 – Updated: 2026-03-11 09:31

Details

The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ast-page-background-meta and ast-content-background-meta post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the astra_get_responsive_background_obj() function for four CSS-context sub-properties (background-color, background-image, overlay-color, overlay-gradient). 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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3534"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-11T07:16:45Z",
    "severity": "MODERATE"
  },
  "details": "The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). 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.",
  "id": "GHSA-9c4x-wwxm-pww8",
  "modified": "2026-03-11T09:31:54Z",
  "published": "2026-03-11T09:31:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3534"
    },
    {
      "type": "WEB",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1629"
    },
    {
      "type": "WEB",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1640"
    },
    {
      "type": "WEB",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1380"
    },
    {
      "type": "WEB",
      "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1386"
    },
    {
      "type": "WEB",
      "url": "https://themes.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=316958%40astra%2F4.12.4\u0026old=312219%40astra%2F4.12.3"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02023f658?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-3534 (GCVE-0-2026-3534)

Vulnerability from cvelistv5 – Published: 2026-03-11 06:45 – Updated: 2026-04-08 17:14

Title

Astra <= 4.12.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Meta

Summary

The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). 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

Wordfence

References

URL

Tags

	https://www.wordfence.com/threat-intel/vulnerabil…
	https://themes.trac.wordpress.org/browser/astra/4…
	https://themes.trac.wordpress.org/browser/astra/4…
	https://themes.trac.wordpress.org/browser/astra/4…
	https://themes.trac.wordpress.org/browser/astra/4…
	https://themes.trac.wordpress.org/changeset?sfp_e…

Impacted products

	Vendor	Product	Version
	brainstormforce	Astra	Affected: 0 , ≤ 4.12.3 (semver)

Credits

Alex Hickey

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3534",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-11T14:00:26.814244Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-11T14:00:35.014Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Astra",
          "vendor": "brainstormforce",
          "versions": [
            {
              "lessThanOrEqual": "4.12.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Alex Hickey"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Astra theme for WordPress is vulnerable to Stored Cross-Site Scripting via the `ast-page-background-meta` and `ast-content-background-meta` post meta fields in all versions up to, and including, 4.12.3. This is due to insufficient input sanitization on meta registration and missing output escaping in the `astra_get_responsive_background_obj()` function for four CSS-context sub-properties (`background-color`, `background-image`, `overlay-color`, `overlay-gradient`). 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"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-04-08T17:14:59.550Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/acf2906b-1ee5-4272-bf6d-36a02023f658?source=cve"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1640"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/core/common-functions.php#L1629"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1386"
        },
        {
          "url": "https://themes.trac.wordpress.org/browser/astra/4.12.3/inc/metabox/class-astra-meta-boxes.php#L1380"
        },
        {
          "url": "https://themes.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026new=316958%40astra%2F4.12.4\u0026old=312219%40astra%2F4.12.3"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-04T17:45:12.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-03-10T17:27:37.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Astra \u003c= 4.12.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Meta"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-3534",
    "datePublished": "2026-03-11T06:45:31.218Z",
    "dateReserved": "2026-03-04T17:29:25.810Z",
    "dateUpdated": "2026-04-08T17:14:59.550Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-9C4X-WWXM-PWW8

CVE-2026-3534 (GCVE-0-2026-3534)

Tags

Sightings

Nomenclature