Vulnerability from bitnami_vulndb
Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0 through 4.3.14, 4.4.0 through 4.4.9, 4.5.0 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request with a non-English Accept-Language header. Using this behavior, an attacker who knows the identifier of a particular status they are not allowed to see can confirm whether this status exists or not. This cannot be used to learn the contents of the status or any other property besides its existence. This issue is fixed in versions 4.2.28, 4.3.15, 4.4.10 and 4.5.3.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "mastodon",
"purl": "pkg:bitnami/mastodon"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.2.28"
},
{
"introduced": "4.3.0"
},
{
"fixed": "4.3.15"
},
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.10"
},
{
"introduced": "4.5.0"
},
{
"fixed": "4.5.3"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2025-67500"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"
],
"severity": "Low"
},
"details": "Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0 through 4.3.14, 4.4.0 through 4.4.9, 4.5.0 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request with a non-English Accept-Language header. Using this behavior, an attacker who knows the identifier of a particular status they are not allowed to see can confirm whether this status exists or not. This cannot be used to learn the contents of the status or any other property besides its existence. This issue is fixed in versions 4.2.28, 4.3.15, 4.4.10 and 4.5.3.",
"id": "BIT-mastodon-2025-67500",
"modified": "2026-10-05T12:12:53.169Z",
"published": "2025-12-11T11:41:16.693Z",
"references": [
{
"type": "FIX",
"url": "https://github.com/mastodon/mastodon/pull/37077/commits/9957d3218cb33fea6a44bb285e2ba4795a059e4f"
},
{
"type": "ADVISORY",
"url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-gwhw-gcjx-72v8"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67500"
}
],
"schema_version": "1.6.2",
"summary": "Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration"
}
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.
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