parisneo lollms up to 2.1.x __init__.py create_post cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in parisneo lollms up to 2.1.x. Impacted is the function create_post of the file backend/routers/social/__init__.py. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-1115. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in parisneo lollms up to 2.1.x and classified as problematic. This issue affects the function create_post of the file backend/routers/social/__init__.py. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

A Stored Cross-Site Scripting (XSS) vulnerability was identified in the social feature of parisneo/lollms, affecting the latest version prior to 2.2.0. The vulnerability exists in the `create_post` function within `backend/routers/social/__init__.py`, where user-provided content is directly assigned to the `DBPost` model without sanitization. This allows attackers to inject and store malicious JavaScript, which is executed in the browsers of users viewing the Home Feed, including administrators. This can lead to account takeover, session hijacking, and wormable attacks. The issue is resolved in version 2.2.0.

The advisory is shared at huntr.com. The identification of this vulnerability is CVE-2026-1115 since 01/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.2.0 eliminates this vulnerability.

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Productinfo

Vendor

• parisneo

Name

• lollms

Version

• 2.0
• 2.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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