CVE-2018-16369

Exp

XRef::fetch in XRef.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (stack consumption) via a crafted pdf file, related to AcroForm::scanField, as demonstrated by pdftohtml. NOTE: this might overlap CVE-2018-7453.

Published: 2018-09-02 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-16369 is rated High Exploit Risk (63.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.62%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.16% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-16369

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-16369

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.46% 1.62% +1.16%
2 2026-03-20 0.98% 0.46% -0.51%
3 2025-12-16 — 0.98% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-16369

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-16369

OS Trackers for CVE-2018-16369

vendor priority summary link
debian unimportant CVE-2018-16369 unimportant priority: Debian including 1 source packages (xpdf), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2018-16369
gentoo normal CVE-2018-16369: 1 GLSA(s) (202409-25), 1 atom(s) (app-text/xpdf); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-16369
suse low CVE-2018-16369 severity low: SUSE including 16 source package names (libpoppler-cpp0, libpoppler-devel, …), 216 product×package rows across 37 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7, … (37 product lines)): Known Not Affected 216. https://www.suse.com/security/cve/CVE-2018-16369/
ubuntu negligible CVE-2018-16369 negligible priority: Ubuntu including 4 source packages (ipe, libextractor, poppler, xpdf), 76 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 29, ignored 27, needs-triage 9, DNE 5, needed 5, deferred 1. https://ubuntu.com/security/CVE-2018-16369

Affected software / configurations for CVE-2018-16369

Vendor Product Version Raw CPE
xpdfreader xpdf 4.00 cpe:2.3:a:xpdfreader:xpdf:4.00:*:*:*:*:*:*:*

References for CVE-2018-16369

URL Tags
https://github.com/TeamSeri0us/pocs/tree/master/xpdf Exploit Third Party Advisory
cvelogic Threat Intelligence