CVE-2025-67500
Dec. 10, 2025, 12:16 a.m.
3.7
Low
Description
Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 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.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Joinmastodon |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-204
Observable Response Discrepancy
The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | joinmastodon | mastodon | <4.2.28 | / | / | / | / | / | / | / |
| a | joinmastodon | mastodon | 4.3.0-beta.1-4.3.14 | / | / | / | / | / | / | / |
| a | joinmastodon | mastodon | 4.4.0-beta.1-4.4.9 | / | / | / | / | / | / | / |
| a | joinmastodon | mastodon | 4.5.0-beta.1-4.5.2 | / | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: HIGH
- Privileges Required: NONE
- Scope: UNCHANGED
- Confidentiality Impact: LOW
- Integrity Impact: NONE
- Availability Impact: NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Timeline
Published: Dec. 10, 2025, 12:16 a.m.
Last Modified: Dec. 10, 2025, 12:16 a.m.
Last Modified: Dec. 10, 2025, 12:16 a.m.
Status : Received
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
security-advisories@github.com
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.