Vulnerability-Lookup

GHSA-R766-3W4J-MH86

Vulnerability from github – Published: 2026-03-21 00:31 – Updated: 2026-03-21 00:31

Details

The Keep Backup Daily plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the backup title alias (val parameter) in the update_kbd_bkup_alias AJAX action in all versions up to, and including, 2.1.2. This is due to insufficient input sanitization and output escaping. While sanitize_text_field() strips HTML tags on save, it does not encode double quotes. The backup titles are output in HTML attribute contexts without esc_attr(). This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via attribute injection that will execute whenever another administrator views the backup list page.

Severity ?

4.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3577"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-21T00:16:28Z",
    "severity": "MODERATE"
  },
  "details": "The Keep Backup Daily plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the backup title alias (`val` parameter) in the `update_kbd_bkup_alias` AJAX action in all versions up to, and including, 2.1.2. This is due to insufficient input sanitization and output escaping. While `sanitize_text_field()` strips HTML tags on save, it does not encode double quotes. The backup titles are output in HTML attribute contexts without `esc_attr()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via attribute injection that will execute whenever another administrator views the backup list page.",
  "id": "GHSA-r766-3w4j-mh86",
  "modified": "2026-03-21T00:31:44Z",
  "published": "2026-03-21T00:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3577"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/functions.php#L626"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/kbd_cron.php#L505"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/trunk/inc/functions.php#L626"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/trunk/inc/kbd_cron.php#L505"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3481587%40keep-backup-daily\u0026new=3481587%40keep-backup-daily\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/18a4fa4b-5c99-4347-8b34-e49f7e0972be?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-3577 (GCVE-0-2026-3577)

Vulnerability from cvelistv5 – Published: 2026-03-20 23:25 – Updated: 2026-03-23 15:55

Title

Keep Backup Daily <= 2.1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via Backup Title

Summary

The Keep Backup Daily plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the backup title alias (`val` parameter) in the `update_kbd_bkup_alias` AJAX action in all versions up to, and including, 2.1.2. This is due to insufficient input sanitization and output escaping. While `sanitize_text_field()` strips HTML tags on save, it does not encode double quotes. The backup titles are output in HTML attribute contexts without `esc_attr()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via attribute injection that will execute whenever another administrator views the backup list page.

Severity ?

4.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/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://plugins.trac.wordpress.org/browser/keep-b…
	https://plugins.trac.wordpress.org/browser/keep-b…
	https://plugins.trac.wordpress.org/browser/keep-b…
	https://plugins.trac.wordpress.org/browser/keep-b…
	https://plugins.trac.wordpress.org/changeset?sfp_…

Impacted products

	Vendor	Product	Version
	fahadmahmood	Keep Backup Daily	Affected: * , ≤ 2.1.2 (semver)

Credits

san6051

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3577",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T15:07:53.730774Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-23T15:55:44.816Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Keep Backup Daily",
          "vendor": "fahadmahmood",
          "versions": [
            {
              "lessThanOrEqual": "2.1.2",
              "status": "affected",
              "version": "*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "san6051"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Keep Backup Daily plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the backup title alias (`val` parameter) in the `update_kbd_bkup_alias` AJAX action in all versions up to, and including, 2.1.2. This is due to insufficient input sanitization and output escaping. While `sanitize_text_field()` strips HTML tags on save, it does not encode double quotes. The backup titles are output in HTML attribute contexts without `esc_attr()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts via attribute injection that will execute whenever another administrator views the backup list page."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/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": "2026-03-20T23:25:11.059Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/18a4fa4b-5c99-4347-8b34-e49f7e0972be?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/functions.php#L626"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/trunk/inc/functions.php#L626"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/tags/2.1.1/inc/kbd_cron.php#L505"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/keep-backup-daily/trunk/inc/kbd_cron.php#L505"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3481587%40keep-backup-daily\u0026new=3481587%40keep-backup-daily\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-20T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Keep Backup Daily \u003c= 2.1.2 - Authenticated (Admin+) Stored Cross-Site Scripting via Backup Title"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-3577",
    "datePublished": "2026-03-20T23:25:11.059Z",
    "dateReserved": "2026-03-04T22:07:27.556Z",
    "dateUpdated": "2026-03-23T15:55:44.816Z",
    "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-R766-3W4J-MH86

CVE-2026-3577 (GCVE-0-2026-3577)

Tags

Sightings

Nomenclature