Security readout for executives and security teams
Plain-English summary
CVE-2021-29039 is a cross-site scripting issue in Liferay Portal 7.3.4. An attacker may be able to place malicious script or HTML in a site name that is later rendered in the Asset module’s categories administration page. This could affect administrators or privileged users viewing that page.
Executive priority
Treat as a targeted web application risk, not a confirmed mass-exploitation emergency. Prioritize remediation where Liferay administrators manage externally influenced content or where many users can create or rename sites.
Technical view
The CVE describes XSS in the Asset module categories administration page in Liferay Portal 7.3.4, triggered through the site name field. The public bundle provides no CVSS score, CWE, or detailed affected-version range beyond 7.3.4.
Likely exposure
Exposure is most likely for organizations running Liferay Portal 7.3.4, especially where untrusted or lower-privileged users can influence site names that administrators later view in category administration.
Exploitation context
The record says remote attackers can inject arbitrary web script or HTML via the site name. The provided sources do not show active exploitation, and CISA KEV status is false. Practical impact depends on who can create or modify site names and who views the affected admin page.
Researcher notes
Evidence is limited to the CVE description and Liferay advisory link. No CVSS, CWE, patch version, or exploit confirmation is included in the provided bundle. Avoid assuming affected versions beyond Liferay Portal 7.3.4 without vendor confirmation.
Mitigation direction
- Check Liferay’s advisory for the vendor-supported fix or upgrade guidance.
- Inventory Liferay Portal deployments and identify any version 7.3.4 instances.
- Restrict who can create or rename sites until remediation is confirmed.
- Review site names for unexpected HTML or script-like content.
Validation and detection
- Confirm whether Liferay Portal 7.3.4 is deployed.
- Verify Asset module category administration is accessible to administrators only.
- Review Liferay advisory details against installed build and patch level.
- Inspect existing site names for suspicious markup.
- Check application logs for unexpected site creation or rename activity.
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
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CVE-2021-29039 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.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
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.