Security readout for executives and security teams
Plain-English summary
CVE-2021-21442 is a cross-site scripting issue in OTRS AG Time Accounting. A highly privileged user could place malicious JavaScript in fields on the project creation screen, and that script might run when another user views the Reporting screen. The main stated impact is confidentiality loss.
Executive priority
Treat this as a moderate-priority remediation item. It is not marked as known exploited, but it can expose sensitive information if a privileged user abuses project fields and another user opens affected reports.
Technical view
The issue is CWE-79 in OTRS AG Time Accounting 7.0.x before 7.0.19. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N, meaning network reachable, low attack complexity, high privileges required, and user interaction required.
Likely exposure
Exposure appears limited to organizations running OTRS AG Time Accounting 7.0.x before 7.0.19. Risk is higher where privileged users can create projects and other users review Reporting screens. The sources do not identify other OTRS products, branches, or deployment modes as affected.
Exploitation context
The source bundle provides no KEV listing and no cited evidence of active exploitation. Exploitation requires high privileges and a user interaction path through Reporting, which lowers broad attack likelihood but can still matter in shared administrative environments.
Researcher notes
This is a stored or persistent XSS-style data flow from project creation fields into Reporting screen rendering. The CVSS vector emphasizes high required privileges and user interaction, with confidentiality impact only. Evidence is limited to the CVE data and OTRS advisory reference.
Mitigation direction
- Upgrade OTRS AG Time Accounting 7.0.x to 7.0.19 or later.
- Review the OTRS security advisory for vendor-specific instructions.
- Limit project creation access until remediation is complete.
- Review privileged account hygiene for users who can create projects.
Validation and detection
- Inventory systems running OTRS AG Time Accounting.
- Confirm whether any 7.0.x installation is below 7.0.19.
- Verify project creation privileges are restricted to trusted users.
- Confirm Reporting users are not exposed to untrusted project data.
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-2021-21442 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/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:N/A:N0.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://otrs.com/release-notes/otrs-security-advisory-2021-12/CVE reference · x_refsource_CONFIRM
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.