---
id: CVE-2025-3225
aliases:
  - GHSA-w42r-mrx7-c633
  - PYSEC-2026-1570
title: LlamaIndex has an XML Entity Expansion vulnerability in its sitemap parser
summary: LlamaIndex has an XML Entity Expansion vulnerability in its sitemap parser
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: llama-index-readers-papers
product: llama-index-readers-papers
ecosystem: pip
affected:
  - llama-index-readers-papers < 0.3.2
patched:
  - llama-index-readers-papers 0.3.2
published: '2025-07-07'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-w42r-mrx7-c633'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-3225'
  - url: >-
      https://github.com/run-llama/llama_index/commit/4f6ee062b19212106a2632af9c9521fc7f0a3584
  - url: 'https://github.com/run-llama/llama_index'
  - url: 'https://huntr.com/bounties/e33c0699-e9a2-49aa-837b-5363205637a2'
tags:
  - osv
  - pip
epss: 0.00419
epssPercentile: 0.35887
ingestedAt: '2026-07-08T18:25:53.539Z'
---

## Overview

An XML Entity Expansion vulnerability, also known as a 'billion laughs' attack, exists in the sitemap parser of the run-llama/llama_index repository, specifically affecting the Papers Loaders package before version 0.3.2 (in llama-index v0.10.0 and above through v0.12.29). This vulnerability allows an attacker to supply a malicious Sitemap XML, leading to a Denial of Service (DoS) by exhausting system memory and potentially causing a system crash. The issue is resolved in version 0.3.2 (in llama-index 0.12.29).

## Affected packages

- `llama-index-readers-papers < 0.3.2`

## Remediation

Upgrade to a patched release:

- `llama-index-readers-papers 0.3.2`