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https://issues.apache.org/jira/browse/WW-5621?focusedWorklogId=1012026&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1012026
]
ASF GitHub Bot logged work on WW-5621:
--------------------------------------
Author: ASF GitHub Bot
Created on: 29/Mar/26 06:16
Start Date: 29/Mar/26 06:16
Worklog Time Spent: 10m
Work Description: lukaszlenart opened a new pull request, #1643:
URL: https://github.com/apache/struts/pull/1643
## Summary
Backport of #1642 from Struts 7 to Struts 6.
- Enable `FEATURE_SECURE_PROCESSING` in `DomHelper` and Tiles
`DigesterDefinitionsReader`
- Remove unused `parseStringAsXML` feature from `StringAdapter` to eliminate
theoretical attack surface
- Deprecate `getParseStringAsXML()` / `setParseStringAsXML()` for future
removal
- Add Billion Laughs protection tests for both XML parsers
## Test plan
- [x] `mvn test -DskipAssembly -pl core -Dtest=DomHelperTest` — 4 tests pass
- [x] `mvn test -DskipAssembly -pl plugins/tiles
-Dtest="TestDigesterDefinitionsReader#testBillionLaughsProtection"` — 1 test
passes
- [x] `mvn test -DskipAssembly -pl plugins/xslt` — builds successfully
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Issue Time Tracking
-------------------
Worklog Id: (was: 1012026)
Time Spent: 50m (was: 40m)
> Harden XML parsers against Entity Expansion (Billion Laughs) attacks
> --------------------------------------------------------------------
>
> Key: WW-5621
> URL: https://issues.apache.org/jira/browse/WW-5621
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - XSLT
> Reporter: Lukasz Lenart
> Assignee: Lukasz Lenart
> Priority: Minor
> Fix For: 6.9.0, 7.2.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Defense-in-depth hardening of XML parsers. Modern JDKs (7u45+) already
> enforce a 64K entity expansion limit, so this is not an exploitable
> vulnerability — all XML sources come from the classpath, not user input.
> Changes:
> - Remove unused {{parseStringAsXML}} feature from {{StringAdapter}} to
> eliminate theoretical attack surface
> - Deprecate {{getParseStringAsXML()}} / {{setParseStringAsXML()}} for
> future removal
> - Enable {{FEATURE_SECURE_PROCESSING}} in Tiles
> {{DigesterDefinitionsReader}}
> - Add unit test verifying JDK entity expansion limit rejects Billion Laughs
> payloads
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