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CVE-2025-25306

Misskey vulnerability

9.3 CRITICALEPSS 0.18%
  1. Published10 Mar 2025

Description

Misskey is an open source, federated social media platform. The patch for CVE-2024-52591 did not sufficiently validate the relation between the `id` and `url` fields of ActivityPub objects. An attacker can forge an object where they claim authority in the `url` field even if the specific ActivityPub object type require authority in the `id` field. Version 2025.2.1 addresses the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityLow
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

Affected products

Misskey< 2025.2.1

Remediation

Fixed in
Misskey≥ 2025.2.1

References

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Frequently asked

Is CVE-2025-25306 being actively exploited?

CVE-2025-25306 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.18%.

How severe is CVE-2025-25306?

CVE-2025-25306 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.18% probability of exploitation.

Which products are affected by CVE-2025-25306?

Affected products include Misskey.

How do I fix CVE-2025-25306?

Upgrade affected software to a fixed version, for example Misskey 2025.2.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-25306 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.