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CVE-2024-56521

27
FAUCET Score

CVE-2024-56521 is a critical vulnerability affecting TCPDF versions prior to 6.8.0, where the library unsafely configures CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER when utilizing libcurl. This flaw carries a CVSS score of 9.8 (CRITICAL), indicating a network-exploitable vulnerability with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.8.0CPE matchmatch criteria
cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 35th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: tecnickcom/tcpdfFixed in: 6.8.0
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-9mgx-552f-59p6high

TCPDF missing certificate validation

Dec 27, 2024

References

github.com / tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554
Product
github.com / tecnickcom/TCPDF/compare/6.7.8...6.8.0
Patch
tcpdf.org
Product