Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-9w5p-pk6t-pkeb
Vulnerability ID VCID-9w5p-pk6t-pkeb
Aliases CVE-2024-56521
GHSA-9mgx-552f-59p6
Summary An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-295 Improper Certificate Validation
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 0.00253 https://api.first.org/data/v1/epss?cve=CVE-2024-56521
cvssv4 8.2 https://github.com/tecnickcom/TCPDF
generic_textual HIGH https://github.com/tecnickcom/TCPDF
cvssv3.1 9.8 https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
cvssv4 8.2 https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
generic_textual HIGH https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
ssvc Track https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
cvssv3.1 9.8 https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
cvssv4 8.2 https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
generic_textual HIGH https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
ssvc Track https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
cvssv4 8.2 https://nvd.nist.gov/vuln/detail/CVE-2024-56521
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-56521
cvssv3.1 9.8 https://tcpdf.org
cvssv4 8.2 https://tcpdf.org
generic_textual HIGH https://tcpdf.org
ssvc Track https://tcpdf.org
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-56521
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56521
https://nvd.nist.gov/vuln/detail/CVE-2024-56521
1091687 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1091687
6.7.8...6.8.0 https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
aab43ab0a824e956276141a28a24c7c0be20f554 https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
GHSA-9mgx-552f-59p6 https://github.com/advisories/GHSA-9mgx-552f-59p6
tcpdf.org https://tcpdf.org
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/tecnickcom/TCPDF
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:N/S:U/C:H/I:H/A:H Found at https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
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:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
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:N/A:Y/T:T/P:M/B:A/M:M/D:T/2024-12-31T18:39:50Z/ Found at https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
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:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
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:N/A:Y/T:T/P:M/B:A/M:M/D:T/2024-12-31T18:39:50Z/ Found at https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-56521
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:N/S:U/C:H/I:H/A:H Found at https://tcpdf.org
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:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://tcpdf.org
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:N/A:Y/T:T/P:M/B:A/M:M/D:T/2024-12-31T18:39:50Z/ Found at https://tcpdf.org
Exploit Prediction Scoring System (EPSS)
Percentile 0.4892
EPSS Score 0.00253
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-10T18:34:04.853719+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2024/56xxx/CVE-2024-56521.json 38.6.0