CVE-2026-28274Public exploitNetwork attack vector

Session theft via same-origin HTML uploads

Published Feb 26, 2026 · Updated Feb 26, 2026

Stored XSS in Morelitea Initiative before 0.32.4 allows remote authenticated users to read session data through uploaded HTML. The document upload path accepts HTML files and serves them from the application origin without sandboxing, so embedded JavaScript runs in a viewer's session. The attack requires document-upload permission and a user opening the hosted file; it exposes cookies and browser storage and enables actions as the victim.

CVSS severity8.7
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Morelitea Initiative before 0.32.4 allows remote authenticated users to read session data through uploaded HTML. The document upload path accepts HTML files and serves them from the application origin without sandboxing, so embedded JavaScript runs in a viewer's session. The attack requires document-upload permission and a user opening the hosted file; it exposes cookies and browser storage and enables actions as the victim.

The record

CVE
CVE-2026-28274
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Morelitea
Product
Initiative
Classifications
CWE-434, CWE-79, T1539, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.32.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Morelitea · Initiativeversion=< 0.32.4

Published CVSS scores

8.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie
T1204.001Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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