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Fencer Vulns
medium 5.3

CVE-2025-8154 json

HTTP Header Injection via Webhook API in Multiple WSO2 Products Allows Response Header Manipulation

published 2026-05-11 5 mo ago modified 2026-10-14 25 d ago also EUVD-2025-209758

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

In Webhook API invocations, the component accepts user-supplied input for HTTP request headers without sufficient validation or sanitization, allowing these headers to be injected into HTTP responses.

By exploiting this vulnerability, a malicious actor can inject or overwrite arbitrary HTTP response headers. This can lead to various adverse effects, including the manipulation of browser caching, alteration of security-related headers, and the injection of sensitive information such as cookie values, potentially enabling session hijacking or other malicious activities.

Patch / fix

  • WSO2 WSO2 API Manager 4.1.0.218, 4.2.0.164, 4.3.0.74, 4.4.0.38, 4.5.0.20
  • WSO2 WSO2 Universal Gateway 4.5.0.19
  • WSO2 WSO2 Traffic Manager 4.5.0.19
  • WSO2 WSO2 API Control Plane 4.5.0.21
  • WSO2 WSO2 Carbon API Gateway 9.20.74.374, 9.28.116.363, 9.29.120.181, 9.30.67.104, 9.31.86.64, 9.32.2
  • WSO2 WSO2 Carbon API Management Implementation 9.20.74.374, 9.28.116.363, 9.29.120.181, 9.30.67.104, 9.31.86.64, 9.32.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • WSO2 WSO2 API Manager
  • WSO2 WSO2 Universal Gateway
  • WSO2 WSO2 Traffic Manager
  • WSO2 WSO2 API Control Plane
  • WSO2 WSO2 Carbon API Gateway
  • WSO2 WSO2 Carbon API Management Implementation

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.