How severe is CVE-2021-43676?

CVE-2021-43676 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43676 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43676?

CVE-2021-43676 affects Swoole Swoole Php Framework. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43676?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-43676 published?

CVE-2021-43676 was published on 2021-12-03 and last updated on 2026-06-17.

CVE-2021-43676

CVE-2021-43676 is a critical-severity vulnerability in Swoole Swoole Php Framework with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Swoole Swoole Php Framework
Published: 2021-12-03
Last modified: 2026-06-17

Description

matyhtf framework v3.0.5 is affected by a path manipulation vulnerability in Smarty.class.php.

Frequently asked questions

What is CVE-2021-43676?: matyhtf framework v3.0.5 is affected by a path manipulation vulnerability in Smarty.class.php.
How severe is CVE-2021-43676?: CVE-2021-43676 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43676 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43676?: CVE-2021-43676 affects Swoole Swoole Php Framework. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43676?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-43676 published?: CVE-2021-43676 was published on 2021-12-03 and last updated on 2026-06-17.

References

https://github.com/matyhtf/framework/issues/206

Affected products (1)

cpe:2.3:a:swoole:swoole_php_framework:3.0.5:*:*:*:*:*:*:*

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →