What’s Vulnerable › Vulnerabilities

CVE-2018-18651

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-25 · updated 2026-06-17
• Weakness: CWE-834

Description

An issue was discovered in Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. This is mainly caused by a large number after the /Count field in the file.

Affected products

• Xpdf: 4.00

References

• https://forum.xpdfreader.com/viewtopic.php?f=3&t=41219&p=41747#p41747
• https://exchange.xforce.ibmcloud.com/vulnerabilities/152005
• https://forum.xpdfreader.com/viewtopic.php?f=3&t=41219&p=41747#p41747

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