Vulnerability-Lookup

CVE-2026-11443 (GCVE-0-2026-11443)

Vulnerability from cvelistv5 – Published: 2026-06-12 23:04 – Updated: 2026-06-15 17:26

Title

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability

Summary

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.

Severity

4.6 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

zdi

References

2 references

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory
https://alltena.com/en/resources/release-notes/re…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Allegra	Allegra	Affected: 8.1.6.22

Date Public

2026-06-11 18:45

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-11443

Vulnerability from fkie_nvd - Published: 2026-06-13 00:16 - Updated: 2026-07-23 09:10

Severity

4.6 (Medium) - CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	zdi-disclosures@trendmicro.com	https://alltena.com/en/resources/release-notes/release-notes-for-release-9-0-0/
	zdi-disclosures@trendmicro.com	https://www.zerodayinitiative.com/advisories/ZDI-26-358/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Allegra",
          "vendor": "Allegra",
          "versions": [
            {
              "status": "affected",
              "version": "8.1.6.22"
            }
          ]
        }
      ],
      "source": "zdi-disclosures@trendmicro.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n por cross-site scripting en Allegra downloadAttachment. Esta vulnerabilidad permite a atacantes remotos ejecutar script arbitrario en instalaciones afectadas de Allegra. Se requiere interacci\u00f3n del usuario para explotar esta vulnerabilidad, ya que el objetivo debe visitar una p\u00e1gina maliciosa o abrir un archivo malicioso.\n\nLa falla espec\u00edfica existe dentro del m\u00e9todo downloadAttachment. El problema resulta de la falta de validaci\u00f3n adecuada de los datos proporcionados por el usuario, lo que puede llevar a la inyecci\u00f3n de script arbitrario. Un atacante puede aprovechar esta vulnerabilidad para ejecutar script en el contexto del usuario actual. Fue ZDI-CAN-28236."
    }
  ],
  "id": "CVE-2026-11443",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5,
        "source": "zdi-disclosures@trendmicro.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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        "ssvcData": {
          "id": "CVE-2026-11443",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-15T17:25:57.871945Z",
          "version": "2.0.3"
        }
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  },
  "published": "2026-06-13T00:16:24.290",
  "references": [
    {
      "source": "zdi-disclosures@trendmicro.com",
      "url": "https://alltena.com/en/resources/release-notes/release-notes-for-release-9-0-0/"
    },
    {
      "source": "zdi-disclosures@trendmicro.com",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-358/"
    }
  ],
  "sourceIdentifier": "zdi-disclosures@trendmicro.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
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          "lang": "en",
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      "type": "Secondary"
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  ]
}

GHSA-M8WQ-7MHG-MGM7

Vulnerability from github – Published: 2026-06-13 00:34 – Updated: 2026-06-13 00:34

Details

The specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.

Severity

4.6 (Medium)


                  
                    CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-11443"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-13T00:16:24Z",
    "severity": "MODERATE"
  },
  "details": "Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.",
  "id": "GHSA-m8wq-7mhg-mgm7",
  "modified": "2026-06-13T00:34:33Z",
  "published": "2026-06-13T00:34:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11443"
    },
    {
      "type": "WEB",
      "url": "https://alltena.com/en/resources/release-notes/release-notes-for-release-9-0-0"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-358"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-11443 (GCVE-0-2026-11443)

FKIE_CVE-2026-11443

GHSA-M8WQ-7MHG-MGM7

Tags

Sightings

Nomenclature