VulnerabilityPublished 27 Dec 2024Updated 3 Nov 2025

CVE-2024-56519: tecnick tcpdf · Cross-site Scripting

Affects tecnick tcpdfSource CVE Database V5

Not known to be exploited · CVSS 7.5 High : upgrade to 6.8.0 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.8.0

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade tecnickcom/TCPDF to 6.8.0.

Affected software

Product	Affected	Fixed in
GitHubtecnickcom/TCPDF`pkg:github/tecnickcom/TCPDF`Other threats	Affected <6.8.0	Fixed in 6.8.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade TCPDF to version 6.8.0 or later immediately once available, as this version addresses the sanitization issue in setSVGStyles.
Implement strict input validation and sanitization on all user-supplied SVG content before it is processed by TCPDF, specifically filtering or escaping font-family attributes to prevent injection of malicious code.
Employ Content Security Policy (CSP) headers and PDF viewer security settings to limit the execution of embedded scripts or malicious content within PDFs.
Monitor and audit PDF generation logs for unusual or unexpected SVG content submissions that could indicate exploitation attempts.
Where feasible, isolate PDF generation processes in sandboxed environments to reduce the risk of lateral movement in case of exploitation.
Educate developers and system administrators about the risks associated with SVG content in PDFs and encourage secure coding practices around third-party libraries.
Stay updated with vendor advisories and community patches related to TCPDF and SVG processing vulnerabilities.

Description

An issue was discovered in TCPDF before 6.8.0.setSVGStyles does not sanitize the SVG font-family attribute.

Impact

For European organizations, the impact of CVE-2024-56519 can be significant, particularly for those relying on TCPDF for automated PDF generation in web applications, reporting tools, or document management systems. The vulnerability could allow attackers to inject malicious SVG content that compromises the confidentiality of sensitive information embedded in PDFs or accessible through the PDF generation process. This could lead to data leakage, exposure of personally identifiable information (PII), or intellectual property theft. Sectors such as finance, healthcare, government, and legal services, which frequently generate and exchange PDF documents, are at heightened risk. Additionally, organizations using TCPDF in customer-facing portals or internal document workflows may face reputational damage and regulatory consequences under GDPR if sensitive data is exposed. The lack of impact on integrity and availability limits the scope to confidentiality breaches, but the ease of remote exploitation without authentication increases the threat surface. The absence of known exploits in the wild provides a window for proactive mitigation, but the potential for rapid weaponization remains high.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Nov 2025, 20:03 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

Related threats