How severe is CVE-2021-40537?

CVE-2021-40537 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-40537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40537?

CVE-2021-40537 affects Owncloud User Ldap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40537?

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

When was CVE-2021-40537 published?

CVE-2021-40537 was published on 2021-09-08 and last updated on 2026-06-17.

CVE-2021-40537

CVE-2021-40537 is a low-severity vulnerability in Owncloud User Ldap with a CVSS 3.x base score of 2.7. 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 2.7)
CVSS v2: 4.0
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Owncloud User Ldap
Published: 2021-09-08
Last modified: 2026-06-17

Description

Server Side Request Forgery (SSRF) vulnerability exists in owncloud/user_ldap < 0.15.4 in the settings of the user_ldap app. Administration role is necessary for exploitation.

Frequently asked questions

What is CVE-2021-40537?: Server Side Request Forgery (SSRF) vulnerability exists in owncloud/user_ldap < 0.15.4 in the settings of the user_ldap app. Administration role is necessary for exploitation.
How severe is CVE-2021-40537?: CVE-2021-40537 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-40537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40537?: CVE-2021-40537 affects Owncloud User Ldap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40537 published?: CVE-2021-40537 was published on 2021-09-08 and last updated on 2026-06-17.

References

https://owncloud.com/security-advisories/cve-2021-40537/

Affected products (1)

cpe:2.3:a:owncloud:user_ldap:*:*:*:*:*:*:*:*

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