CVE-2021-45847

Several missing input validations in the 3MF parser component of Slic3r libslic3r 1.3.0 can each allow an attacker to cause an application crash using a crafted 3MF input file.

Published: 2022-01-25 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45847 is rated Low Risk (32/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.10%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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

Exploit prediction scoring system (EPSS) score for CVE-2021-45847

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 2026-01-31 0.19% 0.10% -0.08%
2 2025-03-17 0.05% 0.19% +0.13%
3 2023-07-08 — 0.05% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45847

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/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-2021-45847

OS Trackers for CVE-2021-45847

vendor priority summary link
debian unimportant CVE-2021-45847 unimportant priority: Debian including 1 source packages (slic3r), 2 status rows across 2 suites (bookworm, bullseye): open 2. https://security-tracker.debian.org/tracker/CVE-2021-45847
ubuntu medium CVE-2021-45847 medium priority: Ubuntu including 1 source packages (slic3r), 14 status rows across 14 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 7, needs-triage 7. https://ubuntu.com/security/CVE-2021-45847

Affected software / configurations for CVE-2021-45847

Vendor Product Version Raw CPE
slic3r slic3r 1.3.0 cpe:2.3:a:slic3r:slic3r:1.3.0:*:*:*:*:*:*:*

References for CVE-2021-45847

URL Tags
https://github.com/slic3r/Slic3r/issues/5118 Issue Tracking Mitigation Patch Third Party Advisory
https://github.com/slic3r/Slic3r/issues/5119 Issue Tracking Mitigation Patch Third Party Advisory
https://github.com/slic3r/Slic3r/issues/5120 Issue Tracking Mitigation Patch Third Party Advisory
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