Security readout for executives and security teams
Plain-English summary
Subrion CMS 4.2.1 has a stored cross-site scripting flaw tied to uploaded image names. If an attacker can upload or influence image metadata, malicious script could be saved and later run in another user’s browser when the content is viewed.
Executive priority
Treat this as a targeted web-application risk, especially if Subrion CMS is public-facing or supports user uploads. Prioritize inventory and vendor guidance before emergency action.
Technical view
The CVE describes stored XSS in Subrion CMS v4.2.1 through the uploaded image name field, including malformed HTML closure or event-handler injection. The source bundle does not provide CVSS, CWE, fixed-version, or official mitigation detail.
Likely exposure
Exposure is most likely in internet-facing Subrion CMS 4.2.1 deployments where untrusted or lower-privileged users can upload images or manage media content.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The GitHub issue and CVE record describe the vulnerability behavior, but not exploitation in the wild.
Researcher notes
Evidence is limited to the CVE description and referenced GitHub issue. No CVSS, CWE, affected CPEs, or fixed version is supplied in the bundle, so remediation claims should remain conservative.
Mitigation direction
- Identify any Subrion CMS 4.2.1 instances.
- Check Subrion project guidance for a fixed release or official workaround.
- Restrict media upload permissions to trusted users only.
- Review uploaded media records for suspicious filenames or markup.
- Monitor CMS pages for unexpected script execution indicators.
Validation and detection
- Confirm deployed Subrion CMS versions from asset inventory.
- Review roles allowed to upload or rename images.
- Inspect media filenames for HTML or script-like content.
- Verify vendor or project references for patch availability.
- Test output encoding only in an authorized staging environment.
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.
CVE-2021-41502 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://github.com/intelliants/subrion/issues/885CVE 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.