Security readout for executives and security teams
Plain-English summary
CVE-2026-1107 affects EyouCMS member avatar handling. A logged-in remote user may manipulate an upload-related parameter and bypass expected restrictions. Public proof-of-concept material is reported, but the provided sources do not show confirmed active exploitation. Treat internet-facing EyouCMS sites as higher priority, especially where member registration is enabled.
Executive priority
Prioritize review for public EyouCMS sites, especially those allowing user accounts. The issue is not currently KEV-listed, but public exploit availability and upload abuse potential justify near-term triage rather than routine backlog handling.
Technical view
VulDB describes unrestricted upload in EyouCMS versions 1.7.0, 1.7.1, and 5.0, in check_userinfo within Diyajax.php for the Member Avatar Handler. The issue involves the viewfile argument and maps to CWE-434 and CWE-284. CVSS v2 is 6.5 with network access, low complexity, and authentication required.
Likely exposure
Exposure is most likely on EyouCMS deployments that allow authenticated member access to avatar functionality. Public-facing sites with open registration have greater practical risk. The sources do not identify cloud services, appliances, or other products as affected.
Exploitation context
The source bundle says exploit material is public and remote exploitation is possible, but authentication is required. CISA KEV is false, and no cited source confirms active exploitation in the wild. A third-party submission references possible code execution through file inclusion, but vendor confirmation is not shown.
Researcher notes
Evidence is primarily from CVE/VulDB records and a referenced public PoC location. The vendor reportedly did not respond. No official patch level or workaround is provided in the sources, so remediation should be verified against current vendor guidance before broad change planning.
Mitigation direction
- Identify any EyouCMS 1.7.0, 1.7.1, or 5.0 deployments.
- Check vendor or project guidance for updates or official remediation.
- Temporarily restrict member avatar upload functionality if business operations allow.
- Limit member registration and authenticated access on public sites where feasible.
- Monitor upload directories for unexpected file types or recent suspicious changes.
Validation and detection
- Confirm EyouCMS version on all managed sites.
- Verify whether member avatar upload functionality is enabled and externally reachable.
- Review logs for unusual Diyajax.php or viewfile-related activity.
- Check uploaded avatar storage for unexpected executable or script-like files.
- Track CVE and VulDB pages for vendor response or remediation updates.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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-2026-1107 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
- Medium
- CVSS
- 6.5 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
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.
AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR86.4Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
6.5MediumVector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
Source materials
- CVE List V5 sourceCVE List V5
- VDB-341699 | EyouCMS Member Avatar Diyajax.php check_userinfo unrestricted uploadCVE reference · vdb-entry, technical-description
- VDB-341699 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #731540 | Hainan Zanzan Network Technology Co. Eyoucms <=1.7.1 causing code execution due to file inclusionCVE reference · third-party-advisory
- https://github.com/24-2021/vul3/blob/main/Eyoucms/Eyoucms%3D1.7.1%20check_userinfo%20api%20viewfile%20exists%2C%20causing%20code%20execution%20due%20to%20file%20inclusion.mdCVE reference · broken-link, exploit
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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.