Security readout for executives and security teams
Plain-English summary
CVE-2021-29281 is a file upload flaw in GFI Mail Archiver versions up to and including 15.1. The risk is that an attacker may be able to upload unexpected files through a vulnerable Telerik Web UI component. The provided sources include public exploit references, but do not show confirmed active exploitation.
Executive priority
Treat this as a high-priority exposure review for any GFI archiving system. Public exploit material increases urgency, especially for externally reachable systems, but the provided evidence does not confirm active exploitation.
Technical view
The CVE describes an insecure Telerik Web UI plugin implementation in GFI Mail Archiver through 15.1, tied to CVE-2014-2217 and CVE-2017-11317. It maps conceptually to unrestricted file upload behavior. The bundle provides no CVSS score, no CWE assignment in the CVE metadata, and no vendor fix details.
Likely exposure
Organizations running GFI Mail Archiver or GFI Archiver version 15.1 or older are the likely exposure group. Risk is higher where the web interface is reachable by untrusted users or the internet.
Exploitation context
The source bundle includes public exploit references, including Exploit-DB and an unauthenticated exploit write-up. CISA KEV is false in the bundle, so active exploitation should not be claimed from this evidence alone.
Researcher notes
Evidence is incomplete: the CVE bundle lacks CVSS, precise CWE metadata, CPEs, and vendor patch details. Analysis should stay tied to GFI Mail Archiver through 15.1 and the cited Telerik file upload context.
Mitigation direction
- Identify all GFI Mail Archiver or GFI Archiver deployments and versions.
- Check GFI vendor guidance for supported upgrades or remediation steps.
- Restrict access to the archiver web interface to trusted networks.
- Review uploaded files, application directories, and web server logs for anomalies.
- Monitor the server for unexpected files, processes, or configuration changes.
Validation and detection
- Confirm whether any deployment runs version 15.1 or older.
- Verify whether the Telerik Web UI component is present and exposed.
- Check whether the archiver interface is reachable from untrusted networks.
- Review logs for suspicious upload activity or unexpected file writes.
- Document findings and remediation status for each deployment.
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-2021-29281 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://cwe.mitre.org/data/definitions/434.htmlCVE reference · x_refsource_MISC
- https://owasp.org/www-community/vulnerabilities/Unrestricted_File_UploadCVE reference · x_refsource_MISC
- https://www.gfi.com/products-and-solutions/network-security-solutions/gfi-archiverCVE reference · x_refsource_MISC
- https://aminbohio.com/gfi-mail-archiver-15-1-telerik-ui-component-arbitrary-file-upload-unauthenticated-exploit/CVE reference · x_refsource_MISC
- https://www.exploit-db.com/exploits/50181CVE 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.