How severe is CVE-2025-3225?

CVE-2025-3225 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-3225 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-3225?

CVE-2025-3225 affects Llamaindex. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-3225?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-3225 have an EU (EUVD) identifier?

Yes. CVE-2025-3225 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20207.

When was CVE-2025-3225 published?

CVE-2025-3225 was published on 2025-07-07 and last updated on 2026-06-17.

CVE-2025-3225

CVE-2025-3225 is a high-severity vulnerability in Llamaindex with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-776.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20207
Weakness: CWE-776
Affected product: Llamaindex
Published: 2025-07-07
Last modified: 2026-06-17

Description

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 version v0.12.21. 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 v0.12.29.

Frequently asked questions

What is CVE-2025-3225?: 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 version v0.12.21. 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 v0.12.29.
How severe is CVE-2025-3225?: CVE-2025-3225 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-3225 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-3225?: CVE-2025-3225 affects Llamaindex. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-3225?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-3225 have an EU (EUVD) identifier?: Yes. CVE-2025-3225 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20207.
When was CVE-2025-3225 published?: CVE-2025-3225 was published on 2025-07-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:llamaindex:llamaindex:*:*:*:*:*:*:*:*

More vulnerabilities in Llamaindex

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CVE-2024-3271 — Critical (CVSS 9.8): A command injection vulnerability exists in the run-llama/llama_index repository, specifically within the safe_eval…
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All CVEs affecting Llamaindex →

Other CWE-776 vulnerabilities

CVE-2019-19144 — Critical (CVSS 9.8): XML External Entity Injection vulnerability in Quantum DXi6702 2.3.0.3 (11449-53631 Build304) devices via…
CVE-2022-23640 — Critical (CVSS 9.8): Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to…
CVE-2014-2228 — Critical (CVSS 9.8): The XStream extension in HP Fortify SCA before 2.2 RC3 allows remote attackers to execute arbitrary code via unsafe…
CVE-2013-4335 — Critical (CVSS 9.8): opOpenSocialPlugin 0.8.2.1, > 0.9.9.2, 0.9.13, 1.2.6: Multiple XML External Entity Injection Vulnerabilities
CVE-2021-23926 — Critical (CVSS 9.1): The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from…
CVE-2020-24590 — Critical (CVSS 9.1): The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML Entity Expansion attacks.

Browse all CWE-776 vulnerabilities →