Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lollms | Lollms | <= 2.1.0 |
Related Weaknesses (CWE)
References
- https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1ExploitThird Party Advisory
- https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1ExploitThird Party Advisory
FAQ
What is CVE-2026-12228?
CVE-2026-12228 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 `D...
How severe is CVE-2026-12228?
CVE-2026-12228 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-12228?
Check the references section above for vendor advisories and patch information. Affected products include: Lollms Lollms.