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Vulnerability details: VCID-ug83-4nag-xye6
Vulnerability ID VCID-ug83-4nag-xye6
Aliases CVE-2024-56366
GHSA-c6fv-7vh8-2rhr
Summary 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 `Accounting.php` file. Using the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01179 https://api.first.org/data/v1/epss?cve=CVE-2024-56366
epss 0.01179 https://api.first.org/data/v1/epss?cve=CVE-2024-56366
cvssv3.1 7.1 https://github.com/PHPOffice/PhpSpreadsheet
cvssv4 8.3 https://github.com/PHPOffice/PhpSpreadsheet
generic_textual HIGH https://github.com/PHPOffice/PhpSpreadsheet
cvssv3.1 7.1 https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
cvssv4 8.3 https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
generic_textual HIGH https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
ssvc Track https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
cvssv3.1 7.1 https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
cvssv4 8.3 https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
generic_textual HIGH https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
ssvc Track https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
cvssv3.1 7.1 https://nvd.nist.gov/vuln/detail/CVE-2024-56366
cvssv4 8.3 https://nvd.nist.gov/vuln/detail/CVE-2024-56366
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-56366
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-56366
https://github.com/PHPOffice/PhpSpreadsheet
https://nvd.nist.gov/vuln/detail/CVE-2024-56366
700a80346be269af668914172bc6f4521982d0b4 https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
GHSA-c6fv-7vh8-2rhr https://github.com/advisories/GHSA-c6fv-7vh8-2rhr
GHSA-c6fv-7vh8-2rhr https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/PHPOffice/PhpSpreadsheet
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/PHPOffice/PhpSpreadsheet
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-03T18:15:43Z/ Found at https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-01-03T18:15:43Z/ Found at https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-56366
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: 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 Found at https://nvd.nist.gov/vuln/detail/CVE-2024-56366
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.79156
EPSS Score 0.01179
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-10T18:34:06.783162+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2024/56xxx/CVE-2024-56366.json 38.6.0