CVE-2026-12228

A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim's browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user's inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1	Exploit Third Party Advisory
https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lollms:lollms:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-18 21:17

Updated : 2026-08-19 19:31

NVD link : CVE-2026-12228

Mitre link : CVE-2026-12228

CVE.ORG link : CVE-2026-12228

JSON object : View

Products Affected

lollms

lollms

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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