Security readout for executives and security teams
Plain-English summary
CVE-2021-30172 is a reflected cross-site scripting issue in Jun-He Technology’s Quan-Fang-Wei-Tong-Xun system. An authenticated remote attacker could inject JavaScript through the picture preview page if a user interacts with crafted content, potentially exposing or altering customer information.
Executive priority
Treat as a moderate-priority remediation item, especially if the system is internet-accessible or contains customer records. It is not reported as actively exploited in the supplied sources, but it can affect confidentiality and integrity.
Technical view
The source describes CWE-79 in Quan-Fang-Wei-Tong-Xun system version 2007.1901. Special characters on the picture preview page are not filtered from user input, enabling reflected XSS. CVSS 3.1 is 4.6: network reachable, low complexity, low privileges required, user interaction required, unchanged scope, low confidentiality and integrity impact.
Likely exposure
Exposure appears limited to organizations running Jun-He Technology Ltd. Quan-Fang-Wei-Tong-Xun system version 2007.1901. The bundle provides no CPEs, deployment details, or broader affected-version range, so asset inventory confirmation is required.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires authenticated access and user interaction, which lowers urgency compared with unauthenticated flaws but still matters where customer data is handled.
Researcher notes
Evidence is sparse. The source bundle identifies the affected product, version, weakness, and CVSS vector, but does not provide a patch version, exploit status, CPE, or detailed remediation. Avoid assuming broader product impact without vendor confirmation.
Mitigation direction
- Check Jun-He or TWCERT guidance for fixed versions or supported mitigations.
- Restrict system access to trusted networks and necessary authenticated users.
- Prioritize output encoding and input handling fixes for the picture preview page.
- Monitor for suspicious links, script errors, and unusual customer-information access.
Validation and detection
- Inventory Quan-Fang-Wei-Tong-Xun deployments and confirm whether version 2007.1901 is present.
- Identify whether the picture preview page is reachable by authenticated remote users.
- Review application behavior for proper encoding of special characters in reflected responses.
- Check logs for suspicious requests targeting picture preview functionality.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2021-30172 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
- 4.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
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:L/UI:R/S:U/C:L/I:L/A:N2.12.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.6MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.twcert.org.tw/tw/cp-132-4711-04469-1.htmlCVE 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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.