Security readout for executives and security teams
Plain-English summary
This is a low-severity Nextcloud Server issue where federated reshares could ignore the intended default sharing permissions. In practice, a file or folder reshared across federated Nextcloud instances might expose more access than administrators expected. The provided sources show fixed releases and state there are no known workarounds.
Executive priority
Treat this as a hygiene and data-exposure fix, not an emergency response. Patch during the normal security maintenance cycle, with higher priority for Nextcloud environments that support cross-organization sharing of sensitive files.
Technical view
CVE-2021-32725 affects Nextcloud Server before 19.0.13, 20.0.11, and 21.0.3. Default share permissions were not respected for federated reshares of files and folders. The CVSS vector indicates network reachability, low complexity, low privileges, user interaction, unchanged scope, and low confidentiality impact only.
Likely exposure
Exposure is most relevant to organizations running affected Nextcloud Server versions with federated file or folder resharing in use. Systems already on 19.0.13, 20.0.11, 21.0.3, or later are reported fixed by the provided advisory data.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Abuse would depend on an affected Nextcloud deployment, federated reshare behavior, a low-privileged participant, and user interaction, based on the CVSS vector.
Researcher notes
The issue maps to CWE-277 and centers on default permission handling during federated reshares. The stated impact is confidentiality only, with no integrity or availability impact in the CVSS vector. The public sources identify the fixed versions but do not provide a supported workaround.
Mitigation direction
- Upgrade Nextcloud Server to 19.0.13, 20.0.11, 21.0.3, or later.
- Do not rely on a workaround; the advisory says none are known.
- Prioritize affected deployments that use federated sharing or external collaboration.
- Check Nextcloud and distribution advisories before making operational exceptions.
Validation and detection
- Inventory deployed Nextcloud Server versions against the affected version ranges.
- Confirm patched systems report 19.0.13, 20.0.11, 21.0.3, or later.
- Review whether federated reshares are enabled or used in production.
- Check sensitive shared folders for unexpected federated reshare permissions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-277: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-32725 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N2.11.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.5LowVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6f6v-h9x9-jj4vCVE reference · x_refsource_CONFIRM
- https://github.com/nextcloud/server/pull/26946CVE reference · x_refsource_MISC
- https://hackerone.com/reports/1178320CVE reference · x_refsource_MISC
- GLSA-202208-17CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insecure Inherited Permissions
Insecure Inherited Permissions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.