CVE-2026-12228Public exploitNetwork attack vector

Stored XSS via unsanitized prompt sharing

Published Jul 18, 2026 · Updated Jul 18, 2026

Stored XSS in ParisNeo LoLLMS through 2.1.0 allows remote authenticated users to execute JavaScript when a recipient opens a shared prompt. The prompt-sharing endpoint stores prompt_content in DBDirectMessage.content without server-side sanitization, and MessageContentRenderer passes inadequately filtered HTML to v-html. A recipient must open the direct-message thread; execution occurs in that user's browser context and permits same-origin data access and authenticated actions.

CVSS severity8.7
High
EPSS probability0.22%
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 ParisNeo LoLLMS through 2.1.0 allows remote authenticated users to execute JavaScript when a recipient opens a shared prompt. The prompt-sharing endpoint stores prompt_content in DBDirectMessage.content without server-side sanitization, and MessageContentRenderer passes inadequately filtered HTML to v-html. A recipient must open the direct-message thread; execution occurs in that user's browser context and permits same-origin data access and authenticated actions.

The record

CVE
CVE-2026-12228
Published
Jul 18, 2026
Updated
Jul 18, 2026
Vendor
ParisNeo
Product
LoLLMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 18, 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=unspecified <=latest

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ParisNeo · LoLLMSversion=unspecified <=latest

Published CVSS scores

8.7huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
5.4NIST NVDCVSS: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')
T1059.007JavaScript/JScript

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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