Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2025-10-23 08:44

Modified

2026-01-08 18:07

Summary

Mastodon quotes control can be bypassed

Details

Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon version 4.4, support for verifiable quote posts with quote controls was added, but it is possible for an attacker to bypass these controls in Mastodon versions prior to 4.4.8 and 4.5.0-beta.2. Mastodon internally treats reblogs as statuses. Since they were not special-treated, an attacker could reblog any post, then quote their reblog, technically quoting themselves, but having the quote feature a preview of the post they did not get authorization for with all of the affordances that would be otherwise denied by the quote controls. This issue has been patched in versions 4.4.8 and 4.5.0-beta.2.

JSON

To clipboard Create KEV Entry

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mastodon",
        "purl": "pkg:bitnami/mastodon"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "4.4.8"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-62605"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon version 4.4, support for verifiable quote posts with quote controls was added, but it is possible for an attacker to bypass these controls in Mastodon versions prior to 4.4.8 and 4.5.0-beta.2. Mastodon internally treats reblogs as statuses. Since they were not special-treated, an attacker could reblog any post, then quote their reblog, technically quoting themselves, but having the quote feature a preview of the post they did not get authorization for with all of the affordances that would be otherwise denied by the quote controls. This issue has been patched in versions 4.4.8 and 4.5.0-beta.2.",
  "id": "BIT-mastodon-2025-62605",
  "modified": "2026-01-08T18:07:34.629Z",
  "published": "2025-10-23T08:44:09.997Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/2dc4552229b55e2e4adaef675e68ed7ae123d78e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/405a49df44033e7d179f3d44d59fb68a67d54789"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.4.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.5.0-beta.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-8h43-rcqj-wpc6"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62605"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Mastodon quotes control can be bypassed"
}

CVE-2025-62605 (GCVE-0-2025-62605)

Vulnerability from cvelistv5 – Published: 2025-10-21 16:46 – Updated: 2025-10-21 18:00

Title

Mastodon quotes control can be bypassed

Summary

Severity ?

4.3 (Medium)


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

CWE

CWE-754 - Improper Check for Unusual or Exceptional Conditions

Assigner

GitHub_M

References

URL

Tags

	https://github.com/mastodon/mastodon/security/adv…	x_refsource_CONFIRM
	https://github.com/mastodon/mastodon/commit/2dc45…	x_refsource_MISC
	https://github.com/mastodon/mastodon/commit/405a4…	x_refsource_MISC
	https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC
	https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	mastodon	mastodon	Affected: >= 4.4.0-beta.1, < 4.4.8 Affected: = 4.5.0-beta.1

Show details on NVD website

JSON

To clipboard Create KEV Entry

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-62605",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-21T17:59:52.795175Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T18:00:16.343Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "mastodon",
          "vendor": "mastodon",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.4.0-beta.1, \u003c 4.4.8"
            },
            {
              "status": "affected",
              "version": "= 4.5.0-beta.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon version 4.4, support for verifiable quote posts with quote controls was added, but it is possible for an attacker to bypass these controls in Mastodon versions prior to 4.4.8 and 4.5.0-beta.2. Mastodon internally treats reblogs as statuses. Since they were not special-treated, an attacker could reblog any post, then quote their reblog, technically quoting themselves, but having the quote feature a preview of the post they did not get authorization for with all of the affordances that would be otherwise denied by the quote controls. This issue has been patched in versions 4.4.8 and 4.5.0-beta.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-754",
              "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-21T16:46:37.879Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/mastodon/mastodon/security/advisories/GHSA-8h43-rcqj-wpc6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-8h43-rcqj-wpc6"
        },
        {
          "name": "https://github.com/mastodon/mastodon/commit/2dc4552229b55e2e4adaef675e68ed7ae123d78e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mastodon/mastodon/commit/2dc4552229b55e2e4adaef675e68ed7ae123d78e"
        },
        {
          "name": "https://github.com/mastodon/mastodon/commit/405a49df44033e7d179f3d44d59fb68a67d54789",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mastodon/mastodon/commit/405a49df44033e7d179f3d44d59fb68a67d54789"
        },
        {
          "name": "https://github.com/mastodon/mastodon/releases/tag/v4.4.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mastodon/mastodon/releases/tag/v4.4.8"
        },
        {
          "name": "https://github.com/mastodon/mastodon/releases/tag/v4.5.0-beta.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mastodon/mastodon/releases/tag/v4.5.0-beta.2"
        }
      ],
      "source": {
        "advisory": "GHSA-8h43-rcqj-wpc6",
        "discovery": "UNKNOWN"
      },
      "title": "Mastodon quotes control can be bypassed"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-62605",
    "datePublished": "2025-10-21T16:46:37.879Z",
    "dateReserved": "2025-10-16T19:24:37.267Z",
    "dateUpdated": "2025-10-21T18:00:16.343Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

Vulnerability from bitnami_vulndb

CVE-2025-62605 (GCVE-0-2025-62605)

Tags

Sightings

Nomenclature