---
title: WAF Release - 2025-10-13
description: Cloudflare WAF managed rulesets 2025-10-13 release
image: https://edgetunnel-b2h.pages.dev/changelog-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://edgetunnel-b2h.pages.dev/changelog/llms.txt  
> Use this file to discover all available pages before exploring further. 

[Skip to content](#%5Ftop) 

# Changelog

New updates and improvements at Cloudflare.

[ Subscribe to RSS ](https://edgetunnel-b2h.pages.dev/changelog/rss/index.xml) [ View RSS feeds ](https://edgetunnel-b2h.pages.dev/fundamentals/new-features/available-rss-feeds/) 

![hero image](https://edgetunnel-b2h.pages.dev/_astro/hero.CVYJHPAd_26AMqX.svg) 

[ ← Back to all posts ](https://edgetunnel-b2h.pages.dev/changelog/) 

## WAF Release - 2025-10-13

Oct 13, 2025 

[ WAF ](https://edgetunnel-b2h.pages.dev/waf/) 

This week’s highlights include a new JinJava rule targeting a sandbox-bypass flaw that could allow malicious template input to escape execution controls. The rule improves detection for unsafe template rendering paths.

**Key Findings**

New WAF rule deployed for JinJava (CVE-2025-59340) to block a sandbox bypass in the template engine that permits attacker-controlled type construction and arbitrary class instantiation; in vulnerable environments this can escalate to remote code execution and full server compromise.

**Impact**

* CVE-2025-59340 — Exploitation enables attacker-supplied type descriptors / Jackson `ObjectMapper` abuse, allowing arbitrary class loading, file/URL access (LFI/SSRF primitives) and, with suitable gadget chains, potential remote code execution and system compromise.

| Ruleset                    | Rule ID     | Legacy Rule ID | Description                         | Previous Action | New Action | Comments                |
| -------------------------- | ----------- | -------------- | ----------------------------------- | --------------- | ---------- | ----------------------- |
| Cloudflare Managed Ruleset | ...c04bab5f | 100892         | JinJava - SSTI - CVE:CVE-2025-59340 | Log             | Block      | This is a New Detection |

```json
{"@context":"https://schema.org","@type":"BlogPosting","@id":"https://edgetunnel-b2h.pages.dev/changelog/post/2025-10-13-waf-release/#page","headline":"WAF Release - 2025-10-13 · Changelog","description":"Cloudflare WAF managed rulesets 2025-10-13 release","url":"https://edgetunnel-b2h.pages.dev/changelog/post/2025-10-13-waf-release/","inLanguage":"en","image":"https://edgetunnel-b2h.pages.dev/changelog-preview.png","dateModified":"2025-10-13","datePublished":"2025-10-13","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://edgetunnel-b2h.pages.dev/#website","name":"Cloudflare Docs","url":"https://edgetunnel-b2h.pages.dev/"}}
```