CVE Intelligence
High Injection

CVE-2025-8154 — HTTP Header Injection via Webhook API in Multiple WSO2 Products Allows Response Header Manipulation

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.

Published May 11, 2026 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: WSO2

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.19%
ahead of 8% of scored CVEs · Oct 14, 2026
Affects
WSO2
Api Control Plane and 5 more
CVSS base
7.5
High · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (WSO2 Api Control Plane, WSO2 Api Manager, WSO2 Traffic Manager…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
WSO2 Api Control Plane ≥ 4.5.0 and < 4.5.0.21 Vulnerable CVE Program (cve.org) e CISA ADP
WSO2 Api Control Plane ≥ 4.5.0 and < 4.5.0.21 Vulnerable NIST National Vulnerability Database
WSO2 Api Manager ≥ 4.1.0 and < 4.1.0.218≥ 4.2.0 and < 4.2.0.164≥ 4.3.0 and < 4.3.0.74≥ 4.4.0 and < 4.4.0.38≥ 4.5.0 and < 4.5.0.20 Vulnerable NIST National Vulnerability Database
WSO2 Api Manager ≥ 4.1.0 and < 4.1.0.218≥ 4.2.0 and < 4.2.0.164≥ 4.3.0 and < 4.3.0.74≥ 4.4.0 and < 4.4.0.38≥ 4.5.0 and < 4.5.0.20 Vulnerable CVE Program (cve.org) e CISA ADP
WSO2 Traffic Manager ≥ 4.5.0 and < 4.5.0.19 Vulnerable CVE Program (cve.org) e CISA ADP
WSO2 Traffic Manager ≥ 4.5.0 and < 4.5.0.19 Vulnerable NIST National Vulnerability Database
WSO2 Universal Gateway ≥ 4.5.0 and < 4.5.0.19 Vulnerable NIST National Vulnerability Database
WSO2 Universal Gateway ≥ 4.5.0 and < 4.5.0.19 Vulnerable CVE Program (cve.org) e CISA ADP
WSO2 WSO2 Carbon API Gateway ≥ 9.20.74 and < 9.20.74.374≥ 9.28.116 and < 9.28.116.363≥ 9.29.120 and < 9.29.120.181≥ 9.30.67 and < 9.30.67.104≥ 9.31.86 and < 9.31.86.64 Vulnerable CVE Program (cve.org) e CISA ADP
WSO2 WSO2 Carbon API Management Implementation ≥ 9.20.74 and < 9.20.74.374≥ 9.28.116 and < 9.28.116.363≥ 9.29.120 and < 9.29.120.181≥ 9.30.67 and < 9.30.67.104≥ 9.31.86 and < 9.31.86.64 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.5 CVSS 3.1 High 3.9 3.6 nvd@nist.gov via NIST National Vulnerability Database
5.3 CVSS 3.1 Medium 3.9 1.4 ed10eef1-636d-4fbe-9993-6890dfa878f8 via NIST National Vulnerability Database
5.3 CVSS 3.1 Medium — — GitHub, Inc. via GitHub Security Advisories
5.3 CVSS 3.1 Medium — — WSO2 via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N (score shown at the top: nvd@nist.gov)
Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 7.5 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-74 · Injection

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.19%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · wso2/wso2 api manager, wso2/wso2 universal gateway, wso2/wso2 traffic manager, wso2/wso2 api control plane, wso2/wso2 ca
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 7.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    May 11, 2026 · WSO2

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 14, 2026 – Oct 14, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

4 on the record

Elsewhere on this site

WSO2
every CVE for this vendor
Injection
same class
CWE-74
other pages naming this weakness

Related CVEs (same products)

  • CVE-2025-12737 OS Command Injection in WSO2 Api Control Plane Sep 3, 2026
  • CVE-2026-3416 Use of Insufficiently Random Values in WSO2 Api Control Plane Sep 3, 2026
  • CVE-2026-5430 WSO2 Multiple Products Path Traversal Vulnerability KEV Aug 6, 2026
  • CVE-2026-1728 Improper Privilege Management in WSO2 Api Control Plane Aug 6, 2026
  • CVE-2026-0637 Insertion of Sensitive Information into Log File in WSO2 Api Control Plane Aug 6, 2026
  • CVE-2025-15039 The Conditional Authentication (Adaptive Authentication) script does not correctly… Aug 6, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-8154 is "HTTP Header Injection via Webhook API in Multiple WSO2 Products Allows Response Header Manipulation", rated High. It affects Api Control Plane (WSO2); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 0.19% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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