CVE-2026-4103

Cross-Site Scripting via HTML Sanitization in WSO2 Publisher and Developer Portals Allows Malicious Script Execution

At a glance

Severity
MEDIUM 6.4
EPSS
EPSS 0.30 % · percentile 23 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
WSO2
NVD status
Deferred

Description

Insufficient HTML sanitization in the Publisher Portal and Developer Portal allows untrusted user input to be rendered without proper encoding or neutralization. This enables the injection and execution of malicious JavaScript when affected API documents are viewed. Successful exploitation may result in the execution of malicious scripts within the user's browser context when viewing API documentation. Users with permissions to access the API documentation through these portals may be impacted, potentially allowing attackers to perform actions on behalf of the user, depending on their session privileges.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWSO2
CVSS 3.1MEDIUM 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NNVD · ed10eef1-636d-4fbe-9993-6890dfa878f8 (Secondary)

Weaknesses (CWE)

European references

Affected products

ProductVersions
WSO2 · WSO2 API Control Planeaffected 4.5.0 < 4.5.0.55 ; affected 4.6.0 < 4.6.0.19
WSO2 · WSO2 API Managerunknown 0 < 3.2.0 ; affected 3.2.0 < 3.2.0.470 ; affected 3.2.1 < 3.2.1.89 ; affected 4.1.0 < 4.1.0.254 ; affected 4.2.0 < 4.2.0.194 ; affected 4.3.0 < 4.3.0.105

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD