Medium Input validation

CVE-2024-6541 — Information Disclosure and Integrity Violation via Improper Message Context Handling in Multiple WSO2 Products

The Class Mediator fails to correctly validate or sanitize `messageContext` properties when they are used to populate dynamic values. This allows authenticated users to potentially access or modify data across different system invocations that should be isolated. This weakness can lead to the disclosure of sensitive information belonging to other users or the unintended modification of system data by authenticated users. The exact impact depends on how `messageContext` properties are utilized within the affected WSO2 products.

Published Aug 6, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: WSO2

Low

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 0.3% (30-day exploitation probability)+4
Technical severity (medium)+3

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

0.34%

ahead of 26% of scored CVEs · Oct 15, 2026

Affects

WSO2

Api Manager and 3 more

CVSS base

6.8

Medium · 2 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

can an attacker script the kill-chain steps

Technical impact

Total

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.

Identify exposed assets running the affected vendor/product/version combinations (WSO2 Api Manager, WSO2 Enterprise Integrator, WSO2 Micro Integrator…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
WSO2	Api Manager	≥ 3.2.1 and < 3.2.1.21≥ 4.0.0 and < 4.0.0.311≥ 4.1.0 and < 4.1.0.167≥ 4.2.0 and < 4.2.0.110≥ 4.3.0 and < 4.3.0.24≥ 3.2.0 and < 3.2.0.394	Vulnerable	CVE Program (cve.org) e CISA ADP
WSO2	Enterprise Integrator	≥ 6.6.0 and < 6.6.0.205	Vulnerable	CVE Program (cve.org) e CISA ADP
WSO2	Micro Integrator	≥ 4.3.0 and < 4.3.0.7≥ 4.1.0 and < 4.1.0.103≥ 1.2.0 and < 1.2.0.163	Vulnerable	CVE Program (cve.org) e CISA ADP
WSO2	WSO2-Synapse	≥ 2.1.7.wso2v182 and < 2.1.7.wso2v182_93≥ 2.1.7.wso2v143 and < 2.1.7.wso2v143_119≥ 2.1.7.wso2v183 and < 2.1.7.wso2v183_62≥ 2.1.7.wso2v319 and < 2.1.7.wso2v319_7≥ 2.1.7.wso2v227 and < 2.1.7.wso2v227_88≥ 2.1.7.wso2v271 and < 2.1.7.wso2v271_60≥ 4.0.0.wso2v119 and < 4.0.0.wso2v119_3≥ 4.0.0.wso2v105 and < 4.0.0.wso2v105_3 and 1 more ≥ 4.0.0.wso2v20 and < 4.0.0.wso2v20_63	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

High

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Every base score collected

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

Score	Version	Severity	Expl.	Impact	Scored by
6.8	CVSS 3.1	Medium	1.6	5.2	ed10eef1-636d-4fbe-9993-6890dfa878f8 via NIST National Vulnerability Database
6.8	CVSS 3.1	Medium	—	—	WSO2 via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N (score shown at the top: ed10eef1-636d-4fbe-9993-6890dfa878f8)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-20 · Improper Input Validation

Other CVEs with this weakness →

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).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · wso2/wso2 micro integrator, wso2/wso2 enterprise integrator, wso2/wso2 api manager, wso2/wso2-synapse
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 6.8
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 6, 2026 · WSO2

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3
vendor-advisory, NIST National Vulnerability Database

Elsewhere on this site

WSO2
every CVE for this vendor

Input validation
same class

CWE-20
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2025-5802 Username Enumeration via Self Registration Flow in Multiple WSO2 Products Allows User Account Discovery Sep 15, 2026
Medium CVE-2026-4103 Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution Sep 14, 2026
Medium CVE-2026-3096 Reverse Tabnabbing via New Tab Navigation in Multiple WSO2 Products Allows Phishing and Credential Theft Sep 10, 2026
High CVE-2025-12737 Arbitrary Code Execution via Administrative Operations in Multiple WSO2 Products Allows Remote Code Execution Sep 3, 2026
High CVE-2026-3416 Predictable Pseudorandom Number Generation via Webhook HMAC Secret Generation in Multiple WSO2 Products Allows Forged Event Payloads Sep 3, 2026
Critical CVE-2026-3418 Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution 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-2024-6541 is "Information Disclosure and Integrity Violation via Improper Message Context Handling in Multiple WSO2 Products", rated Medium. It affects Api Manager (WSO2); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.8 describes technical severity. EPSS 0.34% 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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