Phpspreadsheet
CVE-2024-56409
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.3 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.67%. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 28, 2026
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 8.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Versions prior to 3.7.0, 2.3.5, 2.1.6, and 1.29.7 are vulnerable to unauthorized reflected cross-site scripting in the Currency.php file. Using the /vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Currency.php script, an attacker can perform a cross-site scripting attack. Versions 3.7.0, 2.3.5, 2.1.6, and 1.29.7 contain a patch for the issue. Affected products include: Phpoffice Phpspreadsheet. Version information: prior to 3.7.0.
Know when Phpspreadsheet gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Versions prior to 3.7.0, 2.3.5, 2.1.6, and 1.29.7 are vulnerable to unauthorized reflected cross-site scripting in the Currency.php file. Using the /vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Currency.php script, an attacker can perform a cross-site scripting attack. Versions 3.7.0, 2.3.5, 2.1.6, and 1.29.7 contain a patch for the issue.
Executive ViewAI
Organizations using PhpSpreadsheet face notable risk from CVE-2024-56409, a cross-site scripting vulnerability rated CVSS 8.3. Attackers could inject malicious scripts to steal user sessions, credentials, or perform actions on behalf of authenticated users. Proof-of-concept code is publicly available, increasing the risk of exploitation. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Implement Content-Security-Policy headers; (2) Enable HttpOnly and SameSite cookie attributes; (3) Deploy WAF XSS/CSRF rules.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)GitHub Advisory
More in Phpspreadsheet
View allPHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 8.8), this vul
PHPOffice PhpSpreadsheet before 1.8.0 has an XXE issue. Rated high severity (CVSS 8.8), this vulnerability is remotely e
securityScan() in PHPOffice PhpSpreadsheet through 1.5.0 allows a bypass of protection mechanisms for XXE via UTF-7 enco
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 7.5), this vulnerab
PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 7.5), this vulnerab
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 7.5), this vul
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated high severity (CVSS 7.5), this vul
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated medium severity (CVSS 6.5), this v
This affects the package phpoffice/phpspreadsheet from 0.0.0. Rated medium severity (CVSS 6.4), this vulnerability is re
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated medium severity (CVSS 6.1), this v
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated medium severity (CVSS 5.4), this v
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Rated medium severity (CVSS 5.4), this v
GitHub PoC
Exploit-DB