How severe is CVE-2022-27140?

CVE-2022-27140 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-2022-27140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-27140?

CVE-2022-27140 affects Express-fileupload Project Express-fileupload. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-27140?

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-2022-27140 published?

CVE-2022-27140 was published on 2022-04-12 and last updated on 2026-06-17.

CVE-2022-27140

CVE-2022-27140 is a critical-severity vulnerability in Express-fileupload Project Express-fileupload 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Express-fileupload Project Express-fileupload
Published: 2022-04-12
Last modified: 2026-06-17

Description

An arbitrary file upload vulnerability in the file upload module of express-fileupload 1.3.1 allows attackers to execute arbitrary code via a crafted PHP file. NOTE: the vendor's position is that the observed behavior can only occur with "intentional misusing of the API": the express-fileupload middleware is not responsible for an application's business logic (e.g., determining whether or how a file should be renamed).

Frequently asked questions

What is CVE-2022-27140?: An arbitrary file upload vulnerability in the file upload module of express-fileupload 1.3.1 allows attackers to execute arbitrary code via a crafted PHP file. NOTE: the vendor's position is that the observed behavior can only occur with "intentional misusing of the API": the express-fileupload middleware is not responsible for an application's business logic (e.g., determining whether or how a file should be renamed).
How severe is CVE-2022-27140?: CVE-2022-27140 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-2022-27140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-27140?: CVE-2022-27140 affects Express-fileupload Project Express-fileupload. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-27140?: 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-2022-27140 published?: CVE-2022-27140 was published on 2022-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:express-fileupload_project:express-fileupload:1.3.1:*:*:*:*:node.js:*:*

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