CVE-2026-1115 json
Stored XSS in parisneo/lollms
published 2026-04-10 7 mo ago modified 2026-10-26 13 d ago also GHSA-8wrq-fv5f-pfp2 , PYSEC-2026-401 , EUVD-2026-21320
- cvss
- 9.6
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template parisneo/lollms < 2.2.0 - Authenticated Stored XSS nuclei detection template
- huntr.com https://huntr.com/bounties/099aa4fe-7165-4337-889c-3fb4f1aa71aa referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 9.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| GitHub | 3.0 | 9.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| OSV | 3.0 | 9.6 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | lollms | <2.2.0 |
2.2.0 |
Affected products
- parisneo parisneo/lollms
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/parisneo/lollms/commit/9767b882dbc893c388a286856beeaead69b8292a
web, patch
-
huntr.com
/bounties/099aa4fe-7165-4337-889c-3fb4f1aa71aa
exploit, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-1115
advisory
-
github.com
/ParisNeo/lollms
package
-
pypi.org
/project/lollms
package
-
github.com
/advisories/GHSA-8wrq-fv5f-pfp2
advisory
Sources
- CVE List CVE-2026-1115
- GitHub Advisory GHSA-8wrq-fv5f-pfp2
- NVD CVE-2026-1115
- OSV PYSEC-2026-401
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.