Security readout for executives and security teams
Plain-English summary
This is a reflected XSS issue in JFrog Artifactory. An authenticated high-privilege user could be tricked into interacting with a crafted request that causes script execution through a Users REST API XHR parameter. Business impact is mainly credential, session, or administrative data exposure within Artifactory, not direct server takeover from the provided evidence.
Executive priority
Treat as a scheduled security upgrade, escalated for externally reachable or heavily shared Artifactory deployments. The issue is not listed as actively exploited in the provided evidence, but administrative XSS in a software artifact platform can affect sensitive delivery pipelines.
Technical view
CVE-2021-45721 is CWE-79 reflected cross-site scripting in Artifactory’s Users REST API handling. The CVSS 3.1 score is 6.1 with network access, low complexity, high privileges required, and user interaction required. The provided affected version data points to Artifactory 7.x and 6.x releases before JFrog’s cited fixed versions.
Likely exposure
Exposure is likely limited to organizations running JFrog Artifactory versions older than the fixed releases cited by JFrog and CVE records. Risk is higher where administrative Artifactory access is broadly granted or where the service is reachable by many internal users.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Successful abuse requires high privileges and user interaction, reducing broad internet-scale risk. The impact can still be serious if an administrator session or sensitive Artifactory data is exposed.
Researcher notes
The provided data has inconsistent affected-version wording: fixed thresholds include 7.29.8 and 6.23.38, while affected ranges also mention versions before 7.36.1 and 6.23.41. Validate final remediation targets against JFrog’s advisory before closure.
Mitigation direction
- Upgrade Artifactory to a JFrog-supported fixed version cited in the advisory.
- Review JFrog’s advisory for exact 6.x and 7.x remediation guidance.
- Prioritize internet-facing or shared administrative Artifactory instances.
- Reduce unnecessary access to Artifactory administrative and Users REST API functions.
Validation and detection
- Inventory Artifactory instances and record exact 6.x or 7.x versions.
- Compare installed versions against JFrog’s CVE-2021-45721 advisory.
- Confirm whether Users REST API access is limited to required administrators.
- Review access logs for unusual authenticated activity against user-management endpoints.
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-2021-45721 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/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:H/UI:R/S:U/C:H/I:H/A:N0.95.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.jfrog.com/confluence/display/JFROG/JFrog+Security+AdvisoriesCVE reference · x_refsource_MISC
- https://www.jfrog.com/confluence/display/JFROG/CVE-2021-45721%3A+Cross-Site+Script+%28XSS%29+on+User+REST+APICVE 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.