Security readout for executives and security teams
Plain-English summary
Pydio Cells 2.2.9 has a directory traversal flaw in its Compress feature. A logged-in user could abuse the format parameter to overwrite their own files or files in Cells belonging to other users. This is mainly a data integrity and availability risk for organizations using Pydio Cells for shared file storage.
Executive priority
Prioritize if Pydio Cells stores business-critical or sensitive shared files. The risk is authenticated misuse causing cross-user file overwrite, not unauthenticated takeover based on the provided evidence.
Technical view
The CVE describes directory traversal in Pydio Cells 2.2.9 Compress functionality via the format parameter. The attacker must be authenticated remotely. Reported impact is file overwrite affecting personal files and Cells files owned by any user. The bundle provides no CVSS score, CWE, confirmed fixed version text, or exploit-in-the-wild evidence.
Likely exposure
Exposure is limited to Pydio Cells 2.2.9 deployments where untrusted or lower-privileged authenticated users can access the Compress feature.
Exploitation context
No KEV listing or cited source in the bundle confirms active exploitation. The vulnerability requires valid authentication, but the described cross-user overwrite impact is serious in shared file environments.
Researcher notes
The provided evidence is sparse. The CVE names Pydio Cells 2.2.9 and the vulnerable parameter, but does not include CVSS, CWE, PoC status, exact patch commit, or explicit fixed-version statement in the bundle.
Mitigation direction
- Identify whether any Pydio Cells 2.2.9 instances are deployed.
- Review Pydio Cells 2.2.12 release guidance and vendor advisories.
- Upgrade or remediate according to Pydio-supported instructions.
- Restrict Compress feature access for untrusted users until remediation is confirmed.
- Monitor for unusual file overwrites or unexpected archive activity.
Validation and detection
- Inventory exposed and internal Pydio Cells versions.
- Confirm whether authenticated users can access the Compress feature.
- Review logs for suspicious compression requests involving the format parameter.
- Check for unexpected overwritten files across user Cells.
- Verify remediation against vendor release notes or support guidance.
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.
File access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-41323 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://pydio.com/fr/community/releases/pydio-cells/pydio-cells-enterprise-2212CVE reference · x_refsource_MISC
- https://github.com/pydio/cells/releases/tag/v2.2.12CVE reference · x_refsource_MISC
- https://charonv.net/Pydio-Broken-Access-Control/CVE reference · x_refsource_MISC
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.