Security readout for executives and security teams
Plain-English summary
Mattermost Server versions before 4.7.3 could crash when processing invalid LaTeX text. For an organization using affected Mattermost instances, the main risk is service disruption to internal collaboration, not confirmed data theft or system takeover based on the provided sources.
Executive priority
Prioritize remediation if Mattermost supports business-critical communication or external users can submit content. Treat as a service-availability risk with incomplete public severity data, not as confirmed compromise evidence.
Technical view
CVE-2018-21262 is a denial-of-service issue in Mattermost Server before 4.7.3. The CVE description states that invalid LaTeX text can cause an application crash. No CVSS vector, CWE, detailed affected-version matrix, or exploit details are provided in the source bundle.
Likely exposure
Exposure is most likely where Mattermost Server is running a version earlier than 4.7.3 and accepts user-supplied LaTeX text. The provided affected-product metadata is incomplete, so confirm actual deployed versions against Mattermost guidance.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. It describes a denial-of-service condition caused by invalid LaTeX text, but does not provide exploit maturity, prerequisites, or attacker access requirements.
Researcher notes
The public record is sparse: the CVE states product, version boundary, and crash trigger, but lacks CVSS, CWE, affected CPEs, and technical root-cause detail. Avoid assuming broader impact beyond Mattermost Server before 4.7.3.
Mitigation direction
- Upgrade Mattermost Server to 4.7.3 or later where applicable.
- Review Mattermost security updates for vendor-confirmed remediation guidance.
- Identify and retire unsupported pre-4.7.3 Mattermost deployments.
- Monitor Mattermost availability and crash reports until upgraded.
Validation and detection
- Inventory all Mattermost Server instances and record exact versions.
- Confirm no production instance is earlier than version 4.7.3.
- Review application logs for crashes associated with LaTeX text handling.
- Check Mattermost security updates for any related operational notes.
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.
CVE-2018-21262 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://mattermost.com/security-updates/CVE reference · x_refsource_CONFIRM
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.