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Fencer Vulns
medium 5.9

CVE-2017-5858 json

User Impersonation in converse.js

published 2017-02-09 9 y ago modified 2026-06-17 4 mo ago also GHSA-w973-2qcc-p78x , EUVD-2020-1338

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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 Converse.js (0.8.0 - 1.0.6, 2.0.0 - 2.0.4).

Patch / fix

  • npm converse.js 1.0.7, 2.0.5

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com http://openwall.com/lists/oss-security/2017/02/09/29 referenced PoC, tagged "exploit" by a source, unverified
  • rt-solutions.de https://rt-solutions.de/en/2017/02/CVE-2017-5589_xmpp_carbons/ referenced PoC, tagged "exploit" by a source, unverified
  • rt-solutions.de https://rt-solutions.de/wp-content/uploads/2017/02/CVE-2017-5589_xmpp_carbons.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm converse.js
<1.0.7
>=2.0.0, <2.0.5
1.0.7
2.0.5

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-346 Origin Validation Error

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.