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01 Record

CVE-2026-4103

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

MediumPUBLISHEDCNA: WSO2
CNA base score6.4 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.30% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 22.6% of scored records. A rank, not a probability.
NVD base score
6.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-09-18.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-14 15:54Z1 MO AGO
Last updated
2026-09-14 19:22Z1 MO AGO
Reserved
2026-03-13
Assigning CNA
WSO2
Record state
PUBLISHED
Severity
Medium (CVSS 6.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
bcea5a50fd07d4d26f16c7ce3441f55e977a01a0eea17cc7b24ccc4d8ab559e2

05 Affected products

VendorProductVersionsPlatforms
WSO2WSO2 API Control Plane4.5.0 to < 4.5.0.55, 4.6.0 to < 4.6.0.19—
WSO2WSO2 API Manager3.2.0 to < 3.2.0.470, 3.2.1 to < 3.2.1.89, 4.1.0 to < 4.1.0.254, 4.2.0 to < 4.2.0.194, 4.3.0 to < 4.3.0.105, 4.4.0 to < 4.4.0.69, 4.5.0 to < 4.5.0.54, 4.6.0 to < 4.6.0.18—

06 References

07 Remediation

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-4844/#solution