CVE-2025-52553Network attack vector

RAC session hijacking via unbound connection tokens

Published Jun 27, 2025 · Updated Jun 27, 2025

Improper authentication in authentik before 2025.4.3 and 2025.6.0-rc1 through 2025.6.2 allows context-dependent attackers to hijack RAC sessions. RACInterface.dispatch and the RAC consumer looked up unexpired ConnectionToken values by token alone instead of also matching the request's session key. Exploitation requires a valid token URL exposed from an authorizing user's screen or through equivalent disclosure, and reuse grants access to that user's remote-control session.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in authentik before 2025.4.3 and 2025.6.0-rc1 through 2025.6.2 allows context-dependent attackers to hijack RAC sessions. RACInterface.dispatch and the RAC consumer looked up unexpired ConnectionToken values by token alone instead of also matching the request's session key. Exploitation requires a valid token URL exposed from an authorizing user's screen or through equivalent disclosure, and reuse grants access to that user's remote-control session.

The record

CVE
CVE-2025-52553
Published
Jun 27, 2025
Updated
Jun 27, 2025
Vendor
Authentik Security Inc.
Product
authentik
Classifications
CWE-287, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2025.4.3
  2. Affected versionversion=>= 2025.6.0-rc1, < 2025.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Authentik Security Inc. · authentikversion=< 2025.4.3; version=>= 2025.6.0-rc1, < 2025.6.3

Published CVSS scores

6.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
9.6National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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