How severe is CVE-2021-41809?

CVE-2021-41809 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-41809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41809?

CVE-2021-41809 affects M-files M-files Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41809?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41809 published?

CVE-2021-41809 was published on 2022-01-18 and last updated on 2026-06-17.

CVE-2021-41809

CVE-2021-41809 is a low-severity vulnerability in M-files M-files Server with a CVSS 3.x base score of 3.5. 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-918.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: M-files M-files Server
Published: 2022-01-18
Last modified: 2026-06-17

Description

SSRF vulnerability in M-Files Server products with versions before 22.1.11017.1, in a preview function allowed making queries from the server with certain document types referencing external entities.

Frequently asked questions

What is CVE-2021-41809?: SSRF vulnerability in M-Files Server products with versions before 22.1.11017.1, in a preview function allowed making queries from the server with certain document types referencing external entities.
How severe is CVE-2021-41809?: CVE-2021-41809 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-41809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41809?: CVE-2021-41809 affects M-files M-files Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41809 published?: CVE-2021-41809 was published on 2022-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:m-files:m-files_server:*:*:*:*:*:*:*:*

More vulnerabilities in M-files M-files Server

CVE-2024-10127 — Critical (CVSS 9.8): Authentication bypass condition in LDAP authentication in M-Files server versions before 24.11 supported usage of…
CVE-2025-0635 — High (CVSS 7.5): Denial of service condition in M-Files Server in versions before 25.1.14445.5 allows an unauthenticated user to…
CVE-2024-4056 — High (CVSS 7.5): Denial of service condition in M-Files Server in versions before 24.4.13592.4 and after 23.11 (excluding 24.2 LTS)…
CVE-2023-6912 — High (CVSS 7.5): Lack of protection against brute force attacks in M-Files Server before 23.12.13205.0 allows an attacker unlimited…
CVE-2023-3405 — High (CVSS 7.5): Unchecked parameter value in M-Files Server in versions before 23.6.12695.3 (excluding 23.2 SR2 and newer) allows…
CVE-2023-0383 — High (CVSS 7.5): User-controlled operations could have allowed Denial of Service in M-Files Server before 23.4.12528.1 due to…

All CVEs affecting M-files M-files Server →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

CVE-2026-69502 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure SQL Database allows an unauthorized attacker to elevate privileges over a…
CVE-2026-65801 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges…
CVE-2026-48331 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in…
CVE-2026-54735 — Critical (CVSS 10.0): Prebid Server is an open-source solution for running real-time advertising auctions in the cloud. Prior to version…
CVE-2026-57106 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Data Quality allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-15409 — Critical (CVSS 10.0): A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A…

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →