Security readout for executives and security teams
Plain-English summary
Open eClass versions before 4.2 allow an administrator to import a crafted theme archive that can place arbitrary files on the server. This can lead to remote code execution on the web server. The issue is serious, but it requires administrative privileges, reducing broad unauthenticated exposure.
Executive priority
Prioritize patching affected Open eClass systems, especially public or institution-critical portals. The admin privilege requirement lowers likelihood versus unauthenticated RCE, but successful exploitation could give server-level control and disrupt course management operations.
Technical view
CVE-2026-22241 is a CWE-434 unrestricted file upload in Open eClass theme import. The vulnerable code failed to validate or sanitize files inside uploaded ZIP archives, allowing arbitrary filesystem writes and potential server-side code execution. Affected versions are Open eClass before 4.2. CVSS v4.0 score is 7.3 high with PR:H and UI:N.
Likely exposure
Exposure is limited to Open eClass deployments running versions earlier than 4.2 where an attacker has administrative access or can compromise an administrator account. Internet-facing education portals may have higher business impact if admin accounts are weakly protected.
Exploitation context
The CVE is not listed as KEV in the provided data, and no cited source states active exploitation. Public advisories and a researcher write-up exist, increasing awareness. The CVSS vector includes high impact to confidentiality, integrity, and availability, but exploitation requires high privileges.
Researcher notes
Focus validation on the theme import ZIP handling path and the patch in commit 3f9d267b79812a4dd708bb1302339e6a5abe67d9. Avoid assuming other upload features are affected unless confirmed by vendor sources. Evidence supports Open eClass before 4.2 only.
Mitigation direction
- Upgrade Open eClass to version 4.2 or later.
- Review vendor advisories for any additional configuration guidance.
- Restrict and monitor administrative access to Open eClass.
- Use strong authentication and least privilege for administrator accounts.
- Review recent theme imports and unexpected files on the web server.
Validation and detection
- Inventory Open eClass instances and confirm their installed version.
- Verify whether any deployment is below version 4.2.
- Identify accounts with administrative privileges in Open eClass.
- Check administrative logs for recent theme import activity.
- Confirm the 4.2 patch or related commit is present.
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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program 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-2026-22241 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
- High
- CVSS
- 7.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
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:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
7.3HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/gunet/openeclass/security/advisories/GHSA-rf6j-xgqp-wjxgCVE reference · x_refsource_CONFIRM
- https://github.com/gunet/openeclass/security/advisories/GHSA-gq72-7mwg-424rCVE reference · x_refsource_MISC
- https://github.com/gunet/openeclass/commit/3f9d267b79812a4dd708bb1302339e6a5abe67d9CVE reference · x_refsource_MISC
- https://twelvesec.com/2026/01/16/rce-via-arbitrary-file-upload-at-open-eclass/CVE reference
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.