Security readout for executives and security teams
Plain-English summary
Knowage Suite 7.3 has a reported stored XSS issue in a signup/profile update flow. A malicious value placed in the surname field could later run script in another user’s browser when displayed. Business impact depends on who can submit that field and who later views it.
Executive priority
Prioritize if Knowage 7.3 is externally reachable or used by privileged staff. With no KEV entry or CVSS in the provided sources, this is not proven emergency-level, but public disclosure makes timely inventory and remediation appropriate.
Technical view
The CVE describes stored cross-site scripting through the /knowage/restful-services/signup/update endpoint via the surname parameter in Knowage Suite 7.3. The source bundle provides no CVSS score, CWE, vendor advisory, patch version, authentication requirement, or confirmed exploitation evidence.
Likely exposure
Organizations running Knowage Suite 7.3 are the only clearly identified exposure. Risk is higher if signup or profile update functionality is reachable by untrusted users and surname values are viewed by administrators or privileged users.
Exploitation context
A public proof-of-concept reference exists, but the source bundle does not show active exploitation, KEV listing, or exploitation in the wild. Treat this as publicly disclosed and reproducible enough to prioritize validation, without claiming active attacks.
Researcher notes
Evidence is sparse: one CVE record and a public proof-of-concept reference. Key missing details include affected version range, authentication requirements, fixed version, sanitization behavior, and privilege impact after script execution.
Mitigation direction
- Check Knowage vendor guidance for fixed versions or official remediation.
- Upgrade away from Knowage Suite 7.3 if vendor guidance identifies a fixed release.
- Restrict access to signup and profile update workflows where business allows.
- Review input handling and output encoding in any custom Knowage extensions.
- Monitor stored profile fields for suspicious script-like content.
Validation and detection
- Inventory internet-facing and internal Knowage instances and versions.
- Confirm whether Knowage Suite 7.3 is deployed anywhere.
- Identify whether signup or profile updates are exposed to untrusted users.
- Review surname/profile data for suspicious stored script-like values.
- Review application logs for activity against the signup update endpoint.
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-2021-30211 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/piuppi/Proof-of-Concepts/blob/main/Engineering/Stored-XSS-KnowageSuite7-3-surname.mdCVE 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.