Vulnerability Details : CVE-2023-36462
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual link. This can still be used for phishing, though, similar to IDN homograph attacks. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.
Vulnerability category: Input validation
Products affected by CVE-2023-36462
- cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
- cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
- cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-36462
1.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 76 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-36462
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
2.8
|
2.5
|
NIST | |
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
2.8
|
2.5
|
GitHub, Inc. |
CWE ids for CVE-2023-36462
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2023-36462
-
https://github.com/mastodon/mastodon/releases/tag/v3.5.9
Release v3.5.9 · mastodon/mastodon · GitHubRelease Notes
-
https://github.com/mastodon/mastodon/releases/tag/v4.0.5
Release v4.0.5 · mastodon/mastodon · GitHubRelease Notes
-
https://github.com/mastodon/mastodon/commit/610731b03dfcadd887078cb0399f4e514aa1931c
Merge pull request from GHSA-55j9-c3mp-6fcq · mastodon/mastodon@610731b · GitHubPatch
-
https://github.com/mastodon/mastodon/releases/tag/v4.1.3
Release v4.1.3 · mastodon/mastodon · GitHubRelease Notes
-
https://github.com/mastodon/mastodon/security/advisories/GHSA-55j9-c3mp-6fcq
Verified profile links can be formatted in a misleading way · Advisory · mastodon/mastodon · GitHubVendor Advisory
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