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VulnerabilityPublished Updated

CVE-2025-0663: WSO2 Open Banking IAM · Improper Authentication

Affects WSO2 Open Banking IAMSource CVE Database V5

0

Not known to be exploited · CVSS 6.8 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
WSO2 WSO2 Open Banking IAMAffected
  • =2.0.0
Fixed in–

AI-suggested

To mitigate this vulnerability, European organizations should immediately review and disable the Auto-Login feature in WSO2 Open Banking IAM deployments where it is not essential, reducing the risk of cookie forgery exploitation. Restrict access to Adaptive Authentication functionality to the minimum necessary set of highly trusted administrators and implement strict role-based access controls (RBAC) and monitoring of privileged user activities. Employ network segmentation and multi-factor authentication (MFA) for administrative access to reduce the risk of privilege escalation. Monitor authentication logs for anomalies indicative of cross-tenant cookie forgery attempts. Organizations should engage with WSO2 for updates and patches addressing this cryptographic design flaw and plan for prompt patch deployment once available. Additionally, consider implementing tenant-specific cryptographic keys for signing authentication cookies as a long-term architectural improvement to prevent cross-tenant attacks. Conduct regular security audits and penetration testing focused on multi-tenant isolation controls.

Description

A cross-tenant authentication vulnerability exists in multiple WSO2 products due to improper cryptographic design in Adaptive Authentication. A single cryptographic key is used across all tenants to sign authentication cookies, allowing a privileged user in one tenant to forge authentication cookies for users in other tenants. Because the Auto-Login feature is enabled by default, this flaw may allow an attacker to gain unauthorized access and potentially take over accounts in other tenants. Successful exploitation requires access to Adaptive Authentication functionality, which is typically restricted to high-privileged users. The vulnerability is only exploitable when Auto-Login is enabled, reducing its practical impact in deployments where the feature is disabled.

References

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