How severe is GHSA-qx95-cwh6-9mvq?

No CVSS score has been assigned to GHSA-qx95-cwh6-9mvq yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-qx95-cwh6-9mvq?

GHSA-qx95-cwh6-9mvq affects the following packages: tecnickcom/tcpdf (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-qx95-cwh6-9mvq?

Update tecnickcom/tcpdf to 6.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qx95-cwh6-9mvq is resolved across your whole dependency graph.

How do I detect GHSA-qx95-cwh6-9mvq in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tecnickcom/tcpdf, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-qx95-cwh6-9mvq if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is GHSA-qx95-cwh6-9mvq actively exploited in the wild?

No public exploit code has been indexed for GHSA-qx95-cwh6-9mvq yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-qx95-cwh6-9mvq?

GHSA-qx95-cwh6-9mvq has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 55th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-qx95-cwh6-9mvq?

GHSA-qx95-cwh6-9mvq is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-qx95-cwh6-9mvq published, and has it been updated?

GHSA-qx95-cwh6-9mvq was published on December 27, 2024 and was last updated on November 4, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

TCPDF missing character escape on error messagesGHSA-qx95-cwh6-9mvq

Fix: tecnickcom/TCPDF@11778aa

GHSA-qx95-cwh6-9mvq is a Cross-site Scripting (XSS) vulnerability in tecnickcom/tcpdf. A fix is available for tecnickcom/tcpdf — see the affected versions and patch details below.

Also known asCVE-2024-56527

Published

Dec 27, 2024

Updated

Nov 4, 2025

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-qx95-cwh6-9mvq.

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs55th percentile — riskier than 55% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐘tecnickcom/tcpdf

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

An issue was discovered in TCPDF before 6.8.0. The Error function lacks an htmlspecialchars call for the error message.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`tecnickcom/tcpdf`	all versions	6.8.0`composer require tecnickcom/tcpdf:^6.8.0`

Affected Products

1 product · 1 configurations

Application

tcpdftcpdf_project

< 6.8.0

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tecnickcom/tcpdf, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update tecnickcom/tcpdf to 6.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qx95-cwh6-9mvq is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

An issue was discovered in TCPDF before 6.8.0. The Error function lacks an htmlspecialchars call for the error message.

O3 Security · Impact-Aware SCA

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