Vulnerability-Lookup

CVE-2025-9823 (GCVE-0-2025-9823)

Vulnerability from cvelistv5 – Published: 2025-09-03 14:33 – Updated: 2025-09-03 17:33

Title

Reflected XSS in lead:addLeadTags - Quick Add

Summary

SummaryA Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user’s session. This occurs because user-supplied input is reflected back in the server’s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application. DetailsThe vulnerability resides in the “Tags” input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim’s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user’s session. ImpactA Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user's session within an application by executing malicious JavaScript code within the victim's browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user. References * Web Security Academy: Cross-site scripting https://portswigger.net/web-security/cross-site-scripting * Web Security Academy: Reflected cross-site scripting https://portswigger.net/web-security/cross-site-scripting/reflected

Severity

4.8 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-03 17:32 UTC

CWE

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

Assigner

Mautic CNA under the mitre root

CNA scorecard – unranked: 7 records in the last 180 days, 10 needed details

References

1 reference

URL	Tags
https://github.com/mautic/mautic/security/advisor…

Impacted products

1 product

Vendor	Product	Version	CPE status
Mautic	Mautic	Affected: >= 4.4.0 , < < 4.4.17 (semver) Affected: >= 5.0.0-alpha , < < 5.2.8 (semver) Affected: >= 6.0.0-alpha , < < 6.0.5 (semver)	guessed

Credits

nmmorette kuzmany patrykgruszka

Show details on NVD website

JSON

To clipboard

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              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 4.8,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "ACTIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "LOW",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-79",
                  "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-09-03T14:33:26.111Z",
            "orgId": "4e531c38-7a33-45d3-98dd-d909c0d8852e",
            "shortName": "Mautic"
          },
          "references": [
            {
              "url": "https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm"
            }
          ],
          "source": {
            "advisory": "GHSA-9v8p-m85m-f7mm",
            "discovery": "EXTERNAL"
          },
          "title": "Reflected XSS in lead:addLeadTags - Quick Add",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "4e531c38-7a33-45d3-98dd-d909c0d8852e",
        "assignerShortName": "Mautic",
        "cveId": "CVE-2025-9823",
        "datePublished": "2025-09-03T14:33:26.111Z",
        "dateReserved": "2025-09-02T08:22:35.286Z",
        "dateUpdated": "2025-09-03T17:33:19.941Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2025-9823

Vulnerability from fkie_nvd - Published: 2025-09-03 15:15 - Updated: 2026-10-19 17:10

Severity

4.8 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security@mautic.org	https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://packagist.org",
          "defaultStatus": "unaffected",
          "packageName": "mautic/core",
          "product": "Mautic",
          "repo": "https://github.com/mautic/mautic",
          "vendor": "Mautic",
          "versions": [
            {
              "lessThan": "\u003c 4.4.17",
              "status": "affected",
              "version": "\u003e= 4.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "\u003c 5.2.8",
              "status": "affected",
              "version": "\u003e= 5.0.0-alpha",
              "versionType": "semver"
            },
            {
              "lessThan": "\u003c 6.0.5",
              "status": "affected",
              "version": "\u003e= 6.0.0-alpha",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@mautic.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SummaryA Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user\u2019s session. This occurs because user-supplied input is reflected back in the server\u2019s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application.\n\nDetailsThe vulnerability resides in the \u201cTags\u201d input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim\u2019s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user\u2019s session.\n\nImpactA Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user\u0027s session within an application by executing malicious JavaScript code within the victim\u0027s browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user.\n\nReferences  *   Web Security Academy: Cross-site scripting https://portswigger.net/web-security/cross-site-scripting \n  *   Web Security Academy: Reflected cross-site scripting https://portswigger.net/web-security/cross-site-scripting/reflected"
    },
    {
      "lang": "es",
      "value": "Resumen\nUna vulnerabilidad de cross-site scripting (XSS) permite a un atacante ejecutar JavaScript arbitrario en el contexto de la sesi\u00f3n de otro usuario. Esto ocurre porque la entrada proporcionada por el usuario se refleja en la respuesta del servidor sin una sanitizaci\u00f3n o escape adecuados, lo que podr\u00eda permitir acciones maliciosas como el secuestro de sesi\u00f3n, el robo de credenciales o acciones no autorizadas en la aplicaci\u00f3n.\n\nDetalles\nLa vulnerabilidad reside en el campo de entrada \u0027Tags\u0027 en el endpoint /s/ajax?action=lead:addLeadTags. Aunque el servidor aplica sanitizaci\u00f3n antes de almacenar los datos o devolverlos m\u00e1s tarde, el payload se ejecuta inmediatamente en el navegador de la v\u00edctima tras la reflexi\u00f3n, permitiendo a un atacante ejecutar JavaScript arbitrario en la sesi\u00f3n del usuario.\n\nImpacto\nUn ataque de XSS reflejado puede tener un impacto significativo, permitiendo a los atacantes robar datos sensibles del usuario como cookies, redirigir a los usuarios a sitios web maliciosos, manipular el contenido de la p\u00e1gina web y esencialmente tomar el control de la sesi\u00f3n de un usuario dentro de una aplicaci\u00f3n ejecutando c\u00f3digo JavaScript malicioso dentro del navegador de la v\u00edctima, incluso si el c\u00f3digo del lado del servidor es seguro; esencialmente permiti\u00e9ndoles realizar acciones como si fueran el usuario autenticado.\n\nReferencias\n  *   Web Security Academy: Cross-site scripting https://portswigger.net/web-security/cross-site-scripting\n  *   Web Security Academy: Reflected cross-site scripting https://portswigger.net/web-security/cross-site-scripting/reflected"
    }
  ],
  "id": "CVE-2025-9823",
  "lastModified": "2026-10-19T17:10:00.173",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@mautic.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-9823",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-03T17:32:56.733259Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-09-03T15:15:49.247",
  "references": [
    {
      "source": "security@mautic.org",
      "url": "https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm"
    }
  ],
  "sourceIdentifier": "security@mautic.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@mautic.org",
      "type": "Secondary"
    }
  ]
}

GHSA-9V8P-M85M-F7MM

Vulnerability from github – Published: 2025-09-03 22:18 – Updated: 2025-09-03 22:18

Summary

Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add

Details

Summary

A Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user’s session. This occurs because user-supplied input is reflected back in the server’s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application.

Details

The vulnerability resides in the “Tags” input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim’s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user’s session.

Impact

A Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user's session within an application by executing malicious JavaScript code within the victim's browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user.

References

Severity

4.8 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "mautic/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "4.4.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "mautic/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-alpha"
            },
            {
              "fixed": "5.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "mautic/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0-alpha"
            },
            {
              "fixed": "6.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-9823"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-03T22:18:39Z",
    "nvd_published_at": "2025-09-03T15:15:49Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nA Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user\u2019s session. This occurs because user-supplied input is reflected back in the server\u2019s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application.\n\n## Details\n\nThe vulnerability resides in the \u201cTags\u201d input field on the /s/ajax?action=lead:addLeadTags endpoint. Although the server applies sanitization before storing the data or returning it later, the payload is executed immediately in the victim\u2019s browser upon reflection, allowing an attacker to run arbitrary JavaScript in the user\u2019s session.\n\n## Impact\nA Reflected XSS attack can have a significant impact, allowing attackers to steal sensitive user data like cookies, redirect users to malicious websites, manipulate the web page content, and essentially take control of a user\u0027s session within an application by executing malicious JavaScript code within the victim\u0027s browser, even if the server-side code is secure; essentially enabling them to perform actions as if they were the logged-in user.\n\n## References\n- [Web Security Academy: Cross-site scripting](https://portswigger.net/web-security/cross-site-scripting)\n- [Web Security Academy: Reflected cross-site scripting](https://portswigger.net/web-security/cross-site-scripting/reflected)",
  "id": "GHSA-9v8p-m85m-f7mm",
  "modified": "2025-09-03T22:18:39Z",
  "published": "2025-09-03T22:18:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9823"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mautic/mautic"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

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CVE-2025-9823 (GCVE-0-2025-9823)

FKIE_CVE-2025-9823

GHSA-9V8P-M85M-F7MM

Summary

Details

Impact

References

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour