CVE-2025-53895Network attack vector

Session hijacking via unchecked session updates

Published Jul 15, 2025 · Updated Jul 15, 2025

Incorrect authorization in the ZITADEL session API allows remote authenticated users to hijack sessions by updating a known session ID. The update path accepts the identifier without verifying ownership or the current session token, then issues a fresh token for the original user's session. Any authenticated account with a target session ID can impersonate that user, bypass completed MFA, and access OIDC, SAML, and API resources as the victim.

CVSS severity7.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in the ZITADEL session API allows remote authenticated users to hijack sessions by updating a known session ID. The update path accepts the identifier without verifying ownership or the current session token, then issues a fresh token for the original user's session. Any authenticated account with a target session ID can impersonate that user, bypass completed MFA, and access OIDC, SAML, and API resources as the victim.

The record

CVE
CVE-2025-53895
Published
Jul 15, 2025
Updated
Jul 15, 2025
Vendor
ZITADEL
Product
ZITADEL
Classifications
CWE-384, CWE-863, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=>= 2.53.0, < 2.70.14
  2. Affected versionversion=>= 2.71.0, < 2.71.13
  3. Affected versionversion=>= 3.0.0, < 3.3.1
  4. Affected versionversion== 4.0.0-rc.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ZITADEL · ZITADELversion=>= 2.53.0, < 2.70.14; version=>= 2.71.0, < 2.71.13; version=>= 3.0.0, < 3.3.1; version== 4.0.0-rc.1

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
CWE-863Incorrect Authorization
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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