What is CVE-2018-7453?

CVE-2018-7453 is a medium-severity vulnerability in Xpdfreader Xpdf, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2018-02-24.

How severe is CVE-2018-7453?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2018-7453 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Xpdfreader Xpdf

CVE-2018-7453

Infinite recursion in AcroForm::scanField in AcroForm.cc in xpdf 4.00 allows attackers to launch denial of service via a specific pdf file due to lack of loop checking, as demonstrated by pdftohtml.

Published 2018-02-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Xpdfreader Xpdf — versions 4.00

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

Public proof-of-concept exploits

References

forum.xpdfreader.com/viewtopic.php (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2018-7453?: CVE-2018-7453 is a medium-severity vulnerability in Xpdfreader Xpdf, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2018-02-24.
How severe is CVE-2018-7453?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-7453 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.