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CVE-2025-25306

26
FAUCET Score

CVE-2025-25306 is a critical vulnerability affecting Misskey, an open-source federated social media platform. It stems from insufficient validation of the relationship between the 'id' and 'url' fields in ActivityPub objects, allowing attackers to forge objects and claim unauthorized authority. This vulnerability carries a CVSS score of 9.3 (CRITICAL), indicating it can be exploited remotely with low complexity and no user interaction, potentially leading to high integrity impact and some confidentiality impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2025.2.1CPE matchmatch criteria
cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.3CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.17%
Probability of exploitation in next 30 days
EPSS Percentile
6.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0017 is in the 0th 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

No media coverage found for this CVE.

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 / misskey-dev/misskey/releases/tag/2025.2.1
Patch
github.com / misskey-dev/misskey/security/advisories/GHSA-6w2c-vf6f-xf26
Third Party Advisory