What’s Vulnerable › Vulnerabilities

CVE-2018-17057

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-09-14 · updated 2026-06-17
• Weakness: CWE-502

Description

An issue was discovered in TCPDF before 6.2.22. Attackers can trigger deserialization of arbitrary data via the phar:// wrapper.

Affected products

• LimeSurvey: before 3.16.0 — fixed in 3.16.0
• Tecnick Tcpdf: before 6.2.22 — fixed in 6.2.22

How to fix

Upgrade to a fixed version: LimeSurvey 3.16.0; Tecnick Tcpdf 6.2.22. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/152200/TCPDF-6.2.19-Deserialization-Remote-Code-Execution.html
• http://packetstormsecurity.com/files/152360/LimeSurvey-Deserialization-Remote-Code-Execution.html
• http://seclists.org/fulldisclosure/2019/Mar/36
• https://contao.org/en/news/security-vulnerability-cve-2018-17057.html
• https://github.com/LimeSurvey/LimeSurvey/commit/1cdd78d27697b3150bb44aaa7af1a81062a591a5
• https://github.com/tecnickcom/TCPDF/commit/1861e33fe05f653b67d070f7c106463e7a5c26ed
• https://www.exploit-db.com/exploits/46634/
• http://packetstormsecurity.com/files/152200/TCPDF-6.2.19-Deserialization-Remote-Code-Execution.html
• http://packetstormsecurity.com/files/152360/LimeSurvey-Deserialization-Remote-Code-Execution.html
• http://seclists.org/fulldisclosure/2019/Mar/36
• https://contao.org/en/news/security-vulnerability-cve-2018-17057.html
• https://github.com/LimeSurvey/LimeSurvey/commit/1cdd78d27697b3150bb44aaa7af1a81062a591a5

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