vulnerability / NVI-00014125 / Revision 1
xmldom: Attribute name injection via setAttribute() bypasses requireWellFormed
GitHub lists this reviewed advisory for @xmldom/xmldom, @xmldom/xmldom, xmldom. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
@xmldom/xmldom
source listed>= 0.9.0, <= 0.9.10
## Summary `Element.setAttribute()` in `@xmldom/xmldom` bypasses attribute name validation by calling the private `_createAttribute(name)` method, which performs no validation. The public `createAttribute()` method correctly validates names against an anchored `QName` pattern, but `setAttribute()` never uses it. The serializer escapes attribute *values* but trusts attribute *names*, allowing an attacker to inject additional attributes (including event handlers) into serialized output. The `requireWellFormed: true` option did not catch this. ## Details `Element.setAttribute(name, value)` creates attribute nodes by calling the private `_createAttribute(name)` method, which performs no validation on the `name` parameter. In contrast, the public `Document.createAttribute(name)` method validates the name against the `QName` production before creating the attribute node. The result is a two-tier validation system where the most commonly used API (`setAttribute`) takes the unvalidated path: - `doc.createAttribute("bad name")` — throws `INVALID_CHARACTER_ERR` (correct). - `el.setAttribute("bad name", "value")` — succeeds silently (vulnerable). The serializer emits attribute names ver
@xmldom/xmldom
source listed>= 0.7.0, <= 0.8.13
## Summary `Element.setAttribute()` in `@xmldom/xmldom` bypasses attribute name validation by calling the private `_createAttribute(name)` method, which performs no validation. The public `createAttribute()` method correctly validates names against an anchored `QName` pattern, but `setAttribute()` never uses it. The serializer escapes attribute *values* but trusts attribute *names*, allowing an attacker to inject additional attributes (including event handlers) into serialized output. The `requireWellFormed: true` option did not catch this. ## Details `Element.setAttribute(name, value)` creates attribute nodes by calling the private `_createAttribute(name)` method, which performs no validation on the `name` parameter. In contrast, the public `Document.createAttribute(name)` method validates the name against the `QName` production before creating the attribute node. The result is a two-tier validation system where the most commonly used API (`setAttribute`) takes the unvalidated path: - `doc.createAttribute("bad name")` — throws `INVALID_CHARACTER_ERR` (correct). - `el.setAttribute("bad name", "value")` — succeeds silently (vulnerable). The serializer emits attribute names ver
xmldom
source listed<= 0.6.0
## Summary `Element.setAttribute()` in `@xmldom/xmldom` bypasses attribute name validation by calling the private `_createAttribute(name)` method, which performs no validation. The public `createAttribute()` method correctly validates names against an anchored `QName` pattern, but `setAttribute()` never uses it. The serializer escapes attribute *values* but trusts attribute *names*, allowing an attacker to inject additional attributes (including event handlers) into serialized output. The `requireWellFormed: true` option did not catch this. ## Details `Element.setAttribute(name, value)` creates attribute nodes by calling the private `_createAttribute(name)` method, which performs no validation on the `name` parameter. In contrast, the public `Document.createAttribute(name)` method validates the name against the `QName` production before creating the attribute node. The result is a two-tier validation system where the most commonly used API (`setAttribute`) takes the unvalidated path: - `doc.createAttribute("bad name")` — throws `INVALID_CHARACTER_ERR` (correct). - `el.setAttribute("bad name", "value")` — succeeds silently (vulnerable). The serializer emits attribute names ver
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-4w3w-2rp5-g8jm ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.