Security readout for executives and security teams
Plain-English summary
CVE-2021-27930 is a stored cross-site scripting issue in IrisNext Edition 9.5.16. A logged-in or compromised user could save malicious script in file or folder names, causing other users’ browsers to run it when viewed. Business impact is mainly account/session compromise and unauthorized actions through trusted user browsers.
Executive priority
Treat as a moderate-priority application security issue. Prioritize if IrisNext is internet-accessible, broadly used internally, or handles sensitive documents, because stored XSS can turn one compromised account into broader user-session risk.
Technical view
The CVE describes multiple stored XSS flaws in IrisNext Edition 9.5.16. The CVSS 3.1 score is 5.4 with network access, low attack complexity, low privileges required, changed scope, and required user interaction. The source text mentions session theft, browser code execution, and 1-click RCE, but technical details are limited in the bundle.
Likely exposure
Exposure is likely limited to organizations running IrisNext Edition 9.5.16, especially where many authenticated users share files or folders. Systems not running this product/version are not evidenced as affected by the provided sources.
Exploitation context
The sources do not indicate CISA KEV listing or active exploitation. Exploitation requires an authenticated or compromised account and another user interacting with the affected file or folder name inside the application.
Researcher notes
The record identifies the vulnerable input areas as folder and file names. The bundle does not include enough detail to validate the 1-click RCE claim independently or name exact fixed builds. Avoid assuming broader product impact beyond IrisNext Edition 9.5.16.
Mitigation direction
- Check IrisNext vendor history and advisory for fixed versions or official mitigation guidance.
- Upgrade or apply vendor remediation if an affected IrisNext 9.5.16 deployment is confirmed.
- Restrict IrisNext access to trusted users until remediation is complete.
- Review stored file and folder names for suspicious script-like content.
- Monitor for abnormal session use or unexpected user actions.
Validation and detection
- Inventory IrisNext deployments and confirm whether Edition 9.5.16 is present.
- Review application logs for recent folder or file renaming by unusual accounts.
- Check whether untrusted users can create or rename shared files or folders.
- Verify vendor guidance has been reviewed and remediation status is documented.
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.
Execution 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 lookupCVE-2021-27930 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
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:L/PR:L/S:C/UI:R
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/AC:L/AV:N/A:N/C:L/I:L/PR:L/S:C/UI:R2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AC:L/AV:N/A:N/C:L/I:L/PR:L/S:C/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://varsnext.iriscorporate.com/history.htmlCVE reference · x_refsource_MISC
- https://github.com/post-cyberlabs/CVE-Advisory/blob/main/CVE-2021-27930.pdfCVE 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.