CVE-2025-65368Public exploitNetwork attack vector

Stored XSS via unsanitized chatbot rendering

Published Jan 15, 2026 · Updated Jan 15, 2026

Stored XSS in SparkyFitness 0.15.8.2 allows remote authenticated users to execute JavaScript through persisted chatbot messages. SparkyChatInterface.tsx passes user input and LLM output to React dangerouslySetInnerHTML without sanitization, so saved HTML executes when chat history renders. An authenticated user must submit a payload and another authenticated user must view the affected history, enabling token theft and actions with the victim's session.

CVSS severity5.4
Medium
EPSS probability0.26%
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 SparkyFitness 0.15.8.2 allows remote authenticated users to execute JavaScript through persisted chatbot messages. SparkyChatInterface.tsx passes user input and LLM output to React dangerouslySetInnerHTML without sanitization, so saved HTML executes when chat history renders. An authenticated user must submit a payload and another authenticated user must view the affected history, enabling token theft and actions with the victim's session.

The record

CVE
CVE-2025-65368
Published
Jan 15, 2026
Updated
Jan 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CWE-80, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1203Exploitation for Client Execution

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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