How severe is CVE-2022-27261?

CVE-2022-27261 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2022-27261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-27261?

CVE-2022-27261 affects Express-fileupload Project Express-fileupload. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-27261?

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

When was CVE-2022-27261 published?

CVE-2022-27261 was published on 2022-04-12 and last updated on 2026-06-17.

CVE-2022-27261

CVE-2022-27261 is a high-severity vulnerability in Express-fileupload Project Express-fileupload with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (70th 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 write vulnerability in Express-FileUpload v1.3.1 allows attackers to upload multiple files with the same name, causing an overwrite of files in the web application server.

Frequently asked questions

What is CVE-2022-27261?: An arbitrary file write vulnerability in Express-FileUpload v1.3.1 allows attackers to upload multiple files with the same name, causing an overwrite of files in the web application server.
How severe is CVE-2022-27261?: CVE-2022-27261 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2022-27261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-27261?: CVE-2022-27261 affects Express-fileupload Project Express-fileupload. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-27261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-27261 published?: CVE-2022-27261 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:*:*

More vulnerabilities in Express-fileupload Project Express-fileupload

CVE-2022-27140 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in the file upload module of express-fileupload 1.3.1 allows attackers to…
CVE-2020-7699 — High (CVSS 7.5): This affects the package express-fileupload before 1.1.8. If the parseNested option is enabled, sending a corrupt HTTP…

All CVEs affecting Express-fileupload Project Express-fileupload →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-75949 — Critical (CVSS 10.0): Joomla Extension - cmsjunkie.com - Arbitrary file upload / deletion (path traversal) in J-BusinessDirectory < 6.2.3 -…
CVE-2026-74803 — Critical (CVSS 10.0): Joomla Extension - yootheme.com - Unauthenticated arbitrary file upload in Zoo < 4.1.64 - The image element accepts…
CVE-2026-66665 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.
CVE-2026-61900 — Critical (CVSS 10.0): Joomla Extension - dj-extensions.com - Unauthenticated arbitrary file upload in DJ-jDownloads < 4.1.6 - The Joomla…
CVE-2026-61424 — Critical (CVSS 10.0): Joomla Extension - dj-extensions.com - Unauthenticated arbitrary file upload in DJ-Classifieds < 3.11.2 - The Joomla…
CVE-2026-57719 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in CodeRevolution Aimogen Pro aimogen-pro allows Using…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →