Security readout for executives and security teams
Plain-English summary
ImpressCMS 1.4.4 has a critical file upload weakness. An attacker may bypass extension checks and upload a file that the server treats as PHP code, potentially taking over the website and underlying server context. Prioritize any internet-facing ImpressCMS 1.4.4 instances.
Executive priority
Handle as urgent for any internet-facing ImpressCMS 1.4.4 site. The business risk is website compromise, data exposure, defacement, and service disruption. If the product is not deployed, no action is needed beyond inventory confirmation.
Technical view
The issue is CWE-434 unrestricted file upload caused by weak extension sanitization. The CVSS 3.1 score is 9.8, with network attack vector, low complexity, no privileges, and no user interaction. Sources describe bypass using alternative PHP-related extensions to achieve arbitrary PHP execution.
Likely exposure
Highest exposure is public-facing ImpressCMS 1.4.4 where file upload functionality is reachable and uploaded files can be executed by PHP. Sources only identify ImpressCMS 1.4.4 as affected; other versions are not established in the provided evidence.
Exploitation context
A public ExploitDB entry exists, but CISA KEV status is false in the provided bundle. There is no cited evidence of active exploitation. Treat exploit availability as increasing urgency, especially for internet-facing systems.
Researcher notes
Evidence is strong for ImpressCMS 1.4.4 and unrestricted upload leading to arbitrary PHP execution. The provided sources do not name an official patched version or confirmed active exploitation. Avoid expanding affected versions without vendor confirmation.
Mitigation direction
- Identify and prioritize all ImpressCMS 1.4.4 deployments.
- Check ImpressCMS vendor, GitHub, and advisory pages for fixed versions or official guidance.
- Restrict public access to upload functionality until remediation is confirmed.
- Prevent PHP/script execution from directories used for uploaded content.
- Review uploaded files and remove suspicious executable or unexpected file types.
Validation and detection
- Confirm installed ImpressCMS version on each asset.
- Determine whether the site exposes file upload features to unauthenticated users.
- Verify uploaded-content directories cannot execute PHP or script files.
- Review web and application logs for unusual upload activity.
- Track vendor or advisory updates for confirmed remediation 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.
CWE-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 lookupFile 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-2022-50912 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50890CVE reference · exploit
- Official ImpressCMS HomepageCVE reference · product
- ImpressCMS GitHub RepositoryCVE reference · product
- VulnCheck Advisory: ImpressCMS 1.4.4 - Unrestricted File UploadCVE reference · third-party-advisory
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.
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.