Security readout for executives and security teams
Plain-English summary
Gajim versions through 1.4.7 allowed a chat participant to alter messages they did not originally send. This is an integrity issue, not a data theft or outage flaw. Business impact is highest where XMPP chat records are used for operational decisions, incident response, approvals, or audit trails.
Executive priority
Treat this as a moderate integrity risk. Patch during the next normal client update cycle, faster for teams using XMPP chats as records of decisions, approvals, or security operations.
Technical view
CVE-2022-39835 is an improper access control issue in Gajim through 1.4.7. Crafted XML stanzas could let an attacker in the same group chat or single chat correct messages authored by someone else. CVSS 3.1 is 5.3: network exploitable, low complexity, no user interaction, low integrity impact only.
Likely exposure
Exposure is limited to organizations or users running Gajim through 1.4.7, especially where XMPP chats include untrusted or broad-membership rooms. The source bundle does not provide package-specific affected builds, CPEs, or platform scope.
Exploitation context
The attacker must already be part of the relevant group chat or single chat. The source bundle does not state public exploitation, and KEV is false, so there is no sourced evidence of active exploitation.
Researcher notes
The CVE record gives the core precondition and impact but limited affected-product metadata. Validation should focus on Gajim client version and chat contexts where unauthorized message correction could affect trust, evidence, or workflow decisions.
Mitigation direction
- Upgrade Gajim clients to version 1.5.0 or later.
- Inventory managed endpoints for Gajim versions through 1.4.7.
- Check vendor tags and changelog for version-specific guidance.
- Prioritize remediation for sensitive XMPP rooms and approval workflows.
Validation and detection
- Confirm deployed Gajim clients report version 1.5.0 or later.
- Identify users still running Gajim through 1.4.7.
- Review sensitive chat workflows for reliance on editable message history.
- Check vendor release notes against installed package versions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-39835 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://dev.gajim.org/gajim/gajim/-/tagsCVE reference · x_refsource_MISC
- https://dev.gajim.org/gajim/gajim/-/blob/master/ChangeLogCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.