Security readout for executives and security teams
Plain-English summary
Esigate 5.2 and earlier can turn reflected ESI directives with user-specified XSLT into remote code execution. The business risk is serious where Esigate processes content influenced by users or backend responses. The source notes a fix in version 5.3.
Executive priority
Treat as high priority if Esigate is in the web delivery path and processes dynamic backend content. The issue can lead to remote code execution, but the source evidence indicates a chained condition rather than standalone exposure.
Technical view
CVE-2018-1000854 is an injection issue in Esigate's ESI directive handling when user-specified XSLT reaches a downstream component. Exploitation appears to require another backend weakness that reflects ESI directives. Public CVE data does not provide CVSS details or CPE-based affected product metadata.
Likely exposure
Exposure is likely limited to deployments running Esigate 5.2 or earlier, especially where backend applications can reflect attacker-controlled ESI directives or XSLT content into Esigate processing.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. They describe remote code execution potential, but also state exploitation appears to depend on another backend reflection weakness.
Researcher notes
Evidence is sparse: no CVSS vector, no CPEs, and no KEV status. The key technical condition is ESI directive processing with user-specified XSLT, enabled by a separate backend reflection weakness. Fixed version is reported as 5.3.
Mitigation direction
- Upgrade Esigate deployments to version 5.3 or later.
- Inventory applications and services using Esigate 5.2 or earlier.
- Review backend paths that can reflect ESI directives or user-controlled XSLT.
- Check the referenced project issue for vendor/project guidance.
Validation and detection
- Confirm deployed Esigate versions across builds, containers, and runtime hosts.
- Verify no production service uses Esigate 5.2 or earlier.
- Review request flows where user input can reach ESI directive processing.
- Check application logs for unexpected ESI or XSLT-like content.
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
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-1000854 mapping review
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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://github.com/esigate/esigate/issues/209CVE 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.