CVE-2026-44977 (GCVE-0-2026-44977)

Vulnerability from cvelistv5 – Published: 2026-10-16 16:04 – Updated: 2026-10-16 16:04
VLAI
Title
countly-server: Stored XSS in feedback upload enables app-admin to compromise global admin session context
Summary
countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, plugins/star-rating/api/api.js allows a non-global application administrator to use uploadFeedbackFile to store attacker-controlled active content while trusting the supplied MIME type. plugins/star-rating/frontend/app.js publicly serves the stored content from feedback/preview/ with the attacker-influenced Content-Type, so a global administrator who opens the preview executes the payload in the Countly origin and exposes authenticated session capabilities, including auth_token and csrf_token values. This issue is fixed in versions 24.05.50 and 25.03.44.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7749 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Countly countly-server Affected: < 24.05.50
Affected: >= 25.03, < 25.03.44
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "countly-server",
          "vendor": "Countly",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 24.05.50"
            },
            {
              "status": "affected",
              "version": "\u003e= 25.03, \u003c 25.03.44"
            }
          ]
        }
      ],
      "descriptions": [
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          "value": "countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, plugins/star-rating/api/api.js allows a non-global application administrator to use uploadFeedbackFile to store attacker-controlled active content while trusting the supplied MIME type. plugins/star-rating/frontend/app.js publicly serves the stored content from feedback/preview/ with the attacker-influenced Content-Type, so a global administrator who opens the preview executes the payload in the Countly origin and exposes authenticated session capabilities, including auth_token and csrf_token values. This issue is fixed in versions 24.05.50 and 25.03.44."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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            }
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      "providerMetadata": {
        "dateUpdated": "2026-10-16T16:04:45.868Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc"
        },
        {
          "name": "https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631"
        },
        {
          "name": "https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41"
        },
        {
          "name": "https://github.com/Countly/countly-server/releases/tag/24.05.50",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Countly/countly-server/releases/tag/24.05.50"
        },
        {
          "name": "https://github.com/Countly/countly-server/releases/tag/25.03.44",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/Countly/countly-server/releases/tag/25.03.44"
        }
      ],
      "source": {
        "advisory": "GHSA-jqp4-p86c-phxc",
        "discovery": "UNKNOWN"
      },
      "title": "countly-server: Stored XSS in feedback upload enables app-admin to compromise global admin session context"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44977",
    "datePublished": "2026-10-16T16:04:45.868Z",
    "dateReserved": "2026-05-08T16:23:33.264Z",
    "dateUpdated": "2026-10-16T16:04:45.868Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-44977",
      "date": "2026-10-17",
      "epss": "0.00343",
      "percentile": "0.26284"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "countly-server",
                "vendor": "Countly",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 24.05.50"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 25.03, \u003c 25.03.44"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, plugins/star-rating/api/api.js allows a non-global application administrator to use uploadFeedbackFile to store attacker-controlled active content while trusting the supplied MIME type. plugins/star-rating/frontend/app.js publicly serves the stored content from feedback/preview/ with the attacker-influenced Content-Type, so a global administrator who opens the preview executes the payload in the Countly origin and exposes authenticated session capabilities, including auth_token and csrf_token values. This issue is fixed in versions 24.05.50 and 25.03.44."
          }
        ],
        "id": "CVE-2026-44977",
        "lastModified": "2026-10-16T20:02:37.630",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.0,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.3,
              "impactScore": 6.0,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-16T16:17:44.483",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631"
          },
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            "source": "security-advisories@github.com",
            "url": "https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41"
          },
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            "source": "security-advisories@github.com",
            "url": "https://github.com/Countly/countly-server/releases/tag/24.05.50"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Countly/countly-server/releases/tag/25.03.44"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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