CVE-2024-45048Public exploitNetwork attack vector

Local file disclosure via single-quoted encoding bypass

Published Aug 28, 2024 · Updated Aug 29, 2024

XXE in PHPOffice PhpSpreadsheet before 1.29.1, 2.0.0 through 2.1.0, and 2.2.0 allows remote attackers to read local files via crafted XLSX files. XmlScanner recognizes only double-quoted encoding declarations, so a single-quoted UTF-7 declaration leaves encoded entity markup hidden from its regular-expression filter. Exploitation requires an embedding application to load an attacker-supplied XLSX file; successful entity resolution exposes files readable by that application.

CVSS severity8.8
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in PHPOffice PhpSpreadsheet before 1.29.1, 2.0.0 through 2.1.0, and 2.2.0 allows remote attackers to read local files via crafted XLSX files. XmlScanner recognizes only double-quoted encoding declarations, so a single-quoted UTF-7 declaration leaves encoded entity markup hidden from its regular-expression filter. Exploitation requires an embedding application to load an attacker-supplied XLSX file; successful entity resolution exposes files readable by that application.

The record

CVE
CVE-2024-45048
Published
Aug 28, 2024
Updated
Aug 29, 2024
Vendor
PHPOffice
Product
PhpSpreadsheet
Classifications
CWE-611, T1204.002, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.2.1
  2. Affected versionversion=< 2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PHPOffice · PhpSpreadsheetversion=0 <2.2.1; version=< 2.2.1

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1204.002User Execution: Malicious File
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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