CVE-2021-43617

Exp

Laravel Framework through 8.70.2 does not sufficiently block the upload of executable PHP content because Illuminate/Validation/Concerns/ValidatesAttributes.php lacks a check for .phar files, which are handled as application/x-httpd-php on systems based on Debian. NOTE: this CVE Record is for Laravel Framework, and is unrelated to any reports concerning incorrectly written user applications for image upload.

Published: 2021-11-14 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-43617 is rated High Exploit Risk (83.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 50.13%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). 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-2021-43617

EDB-ID Source Kind Published Link
50525 exploit_db edb 2021-11-15 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-43617

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 2026-05-15 56.48% 50.13% -6.34%
2 2026-04-27 52.77% 56.48% +3.70%
3 2025-12-13 — 52.77% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-43617

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-43617

GitHub Security Advisory for CVE-2021-43617

GHSA-364w-9g92-3grq · Severity: medium · Ecosystem: composer — Withdrawn: Laravel Framework does not sufficiently block the upload of executable PHP content.

OS Trackers for CVE-2021-43617

vendor priority summary link
debian not yet assigned CVE-2021-43617 not yet assigned priority: Debian including 1 source packages (php-laravel-framework), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-43617
ubuntu medium CVE-2021-43617 medium priority: Ubuntu including 1 source packages (php-laravel-framework), 4 status rows across 4 suites (hirsute, trusty, upstream, xenial): ignored 3, needs-triage 1. https://ubuntu.com/security/CVE-2021-43617

Affected software / configurations for CVE-2021-43617

Vendor Product Version Raw CPE
laravel framework <= 8.70.2 cpe:2.3:a:laravel:framework:*:*:*:*:*:*:*:*

References for CVE-2021-43617

cvelogic Threat Intelligence