CVE-2025-13909: wso2 email otp authenticator Improper Input Validation
Vulnerability summary
CVE-2025-13909 is a medium (CVSS 4.3) Improper Input Validation vulnerability in wso2 email otp authenticator. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 26.9% of scored vulnerabilities.
Timeline
- 06-08-2026PublishedVulnerability first disclosed.
- 06-08-2026Last modifiedVulnerability information updated.
Description
The system accepts authentication requests without sufficient validation to enforce tenant isolation when using Email OTP, SMS OTP, or Magic Link as first-factor authenticators. This failure to adequately separate user data between tenants can lead to the exposure of personally identifiable information. Successful exploitation allows an attacker to disclose personally identifiable information of users in different tenants, resulting in privacy violations and potential regulatory non-compliance. This may include unauthorized access to user details such as mobile numbers.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.35%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
+0.14 pp
From 0.21% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Affected systems
Wso26 products
- email otp authenticator≥ 1.0.30, < 1.0.30.4
- identity_server≥ 7.0.0, < 7.0.0.134 | ≥ 7.1.0, < 7.1.0.42
- wso2 carbon abstract otp authenticator≥ 1.0.5, < 1.0.5.4 | ≥ 1.0.10, < 1.0.10.1
- wso2 carbon identity application authentication framework≥ 7.0.78, < 7.0.78.162 | ≥ 7.8.23, < 7.8.23.66
- wso2 carbon magiclink authenticator module≥ 1.1.22, < 1.1.22.6 | ≥ 1.1.31, < 1.1.31.3
1 vendor · 6 products