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CVE-2024-23832

35
FAUCET Score

CVE-2024-23832 is a critical vulnerability affecting Mastodon, an open-source social network server, specifically versions prior to 3.5.17, 4.0.13, 4.1.13, and 4.2.5. This flaw, categorized as insufficient origin validation (CWE-290), allows attackers to impersonate and take over any remote Mastodon account. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.5.17CPE matchmatch criteria
cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.13CPE matchmatch criteria
cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
>= 4.1.0, < 4.1.13CPE matchmatch criteria
cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*
>= 4.2.0, < 4.2.5CPE matchmatch criteria
cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.4CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.45%
Probability of exploitation in next 30 days
EPSS Percentile
82.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0245 is in the 73rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / mastodon/mastodon/commit/1726085db5cd73dd30953da858f9887bcc90b958
Patch
github.com / mastodon/mastodon/security/advisories/GHSA-3fjr-858r-92rw
Vendor Advisory
openwall.com / lists/oss-security/2024/02/02/4
Mailing ListPatch