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CVE record · CVE-2026-4103

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

CVSS 6.4 MediumEPSS 0.0030 · 22nd percentile

Published by the CVE Program (CNA: WSO2) at 14 Sept 2026, 15:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
WSO2 WSO2 API Control Plane
  • affected 4.5.0 to before 4.5.0.55 custom
  • affected 4.6.0 to before 4.6.0.19 custom
Other versions: unaffected
WSO2 WSO2 API Manager
  • unknown before 3.2.0 custom
  • affected 3.2.0 to before 3.2.0.470 custom
  • affected 3.2.1 to before 3.2.1.89 custom
  • affected 4.1.0 to before 4.1.0.254 custom
  • affected 4.2.0 to before 4.2.0.194 custom
  • affected 4.3.0 to before 4.3.0.105 custom
  • affected 4.4.0 to before 4.4.0.69 custom
  • affected 4.5.0 to before 4.5.0.54 custom
  • affected 4.6.0 to before 4.6.0.18 custom
Other versions: unaffected
Identifiers
CVE-2026-4103
CNA
WSO2
Weakness (CWE)
CWE-79
Tags
Published
14 Sept 2026
Updated
14 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N CNA (WSO2)
  • CISA KEV Not listed.
  • EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.