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CVE-2017-5858 Conversejs CVE debrief

CVE-2017-5858 affects multiple Converse.js releases and can let a remote attacker make the application display messages as if they came from another user or contact. The practical risk is social engineering: users may be misled by a forged sender identity in the chat interface.

Vendor
Conversejs
Product
CVE-2017-5858
CVSS
MEDIUM 5.9
CISA KEV
Not listed in stored evidence
Original CVE published
2017-02-09
Original CVE updated
2026-05-13
Advisory published
2017-02-09
Advisory updated
2026-05-13

Who should care

Organizations and users running Converse.js 0.8.0-1.0.6 or 2.0.0-2.0.4, especially environments that rely on the client UI to establish who said what.

Technical summary

NVD describes an incorrect implementation of XEP-0280 Message Carbons in Converse.js that allows remote impersonation in the displayed conversation context. The record lists affected versions 0.8.0-1.0.6 and 2.0.0-2.0.4, with CVSS v3.0 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N and weaknesses CWE-20 and CWE-346. The main impact is integrity loss in the user interface rather than data exposure or service disruption.

Defensive priority

Medium priority: the issue is remotely reachable and can directly undermine trust in message identity, but NVD rates attack complexity as high and the CVSS score is 5.9.

Recommended defensive actions

  • Identify any deployed Converse.js instances and confirm whether they fall within the affected version ranges.
  • Upgrade to a Converse.js release that is not listed as vulnerable in the NVD record.
  • Treat sender identity shown by the client as untrusted until the affected versions are removed or remediated.
  • Review the linked patch commit and vendor advisories to confirm the exact remediation path in your environment.

Evidence notes

Source corpus shows the CVE published on 2017-02-09 and modified by NVD on 2026-05-13. NVD lists affected Converse.js versions explicitly and provides a patch commit reference plus third-party advisories. The third-party advisory URL/title in the corpus uses CVE-2017-5589, which does not match this CVE record number, so it should be treated as a reference-label mismatch rather than a different vulnerability.

Official resources

Public debrief derived from the supplied CVE/NVD corpus and linked official references. Timing context uses the CVE published date from the record (2017-02-09); no exploit instructions are included.