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Fencer Intel
medium 5.9

CVE-2017-5591 json

SleekXMPP and Slixmpp Incorrect Implementation of Message Carbons

published 2017-02-09 9 y ago modified 2026-06-17 4 mo ago also GHSA-c35g-jr5f-h83p , PYSEC-2017-103 , PYSEC-2017-104 , EUVD-2017-0129

cvss
5.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
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 SleekXMPP up to 1.3.1 and Slixmpp all versions up to 1.2.3, as bundled in poezio (0.8 - 0.10) and other products.

Patch / fix

  • pypi slixmpp 1.2.4
  • pypi sleekxmpp 1.3.2
  • slixmpp Debian 14, Debian 13, Debian 12 1.2.2-1.1

debian advisories DEBIAN-CVE-2017-5591

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-5591 updated cvss 7.1

python-sleekxmpp: User impersonation vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 3.1 5.9 CVSS:3.1/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 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
pypi slixmpp
<1.2.4
1.2.4
pypi sleekxmpp
<1.3.2
1.3.2

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-346 Origin Validation Error
  • CWE-940 Improper Verification of Source of a Communication Channel

References

Sources

Fencer Intel 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.