Security readout for executives and security teams
Plain-English summary
xmldom had a flaw in how it serialized certain XML content. A crafted XML document could be transformed into different syntax than the application expected, potentially changing downstream processing results. The issue is fixed in xmldom 0.7.0.
Executive priority
Treat this as a moderate dependency risk. Prioritize remediation where xmldom processes external XML or feeds business-critical automation. It is not evidenced as actively exploited in the provided sources, but the fix is available and should be applied.
Technical view
CVE-2021-32796 is a CWE-116 escaping issue in xmldom before 0.7.0. Removed elements were not correctly escaped during serialization, allowing malicious XML input to cause unexpected syntactic changes in downstream XML processing. CVSS 3.1 is 6.5, network exploitable, low complexity, no privileges, no user interaction.
Likely exposure
Applications using xmldom below 0.7.0 are potentially exposed, especially where XML is accepted from users, integrations, APIs, or files and then serialized for downstream decisions. Exposure depends on application-specific XML workflows.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. Practical impact depends on whether an application trusts xmldom serialization output in a security-sensitive or integrity-sensitive flow.
Researcher notes
Focus assessment on data-flow, not only package presence. The vulnerable behavior matters when malicious XML can reach xmldom and serialized output influences downstream processing. The sources name upgrade to 0.7.0 and input validation as remediation direction.
Mitigation direction
- Upgrade xmldom to version 0.7.0 or later.
- Validate XML input before parsing and reject crafted or unexpected documents.
- Review downstream XML consumers for trust in serialized output.
- Check vendor guidance if pinned dependencies prevent immediate upgrade.
Validation and detection
- Review dependency manifests and lockfiles for xmldom below 0.7.0.
- Identify XML parsing paths that accept untrusted or partner-supplied input.
- Confirm serialized XML is not used for access, routing, or integrity decisions.
- Verify test coverage for malformed XML handling and rejection behavior.
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-116: 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-2021-32796 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:N/UI:N/S:U/C:L/I:L/A:N3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/CVE reference · x_refsource_MISC
- https://github.com/xmldom/xmldom/security/advisories/GHSA-5fg8-2547-mr8qCVE reference · x_refsource_CONFIRM
- https://github.com/xmldom/xmldom/commit/7b4b743917a892d407356e055b296dcd6d107e8bCVE 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 Encoding or Escaping of Output
Improper Encoding or Escaping of Output represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.