Security readout for executives and security teams
Plain-English summary
Loomio versions before 1.8.0 allowed unsafe Markdown content in threads or comments to become executable script or HTML. If viewed by other users, this could expose sessions or let an attacker act within the affected web application context.
Executive priority
Treat as a moderate-priority web application security fix. It is not listed as actively exploited, but stored XSS in collaboration software can affect trusted users and should be remediated promptly where Loomio is deployed.
Technical view
CVE-2017-11594 is a cross-site scripting issue in Loomio's Markdown parser. Non-sanitized Markdown content submitted in a new thread or thread comment could inject arbitrary web script or HTML. The provided sources identify Loomio before 1.8.0 and point to a 1.8.0 release and fixing commit.
Likely exposure
Exposure is likely limited to organizations running Loomio before 1.8.0, especially instances where remote users can create threads or comments containing Markdown.
Exploitation context
The provided bundle does not show active exploitation, and KEV is false. Practical abuse would require placing malicious content where another Loomio user views it.
Researcher notes
The source data lacks CVSS, CWE, and precise CPE entries. Analysis is based on the CVE description, GitHub issue, 1.8.0 release, and fixing commit. Do not assume other products are affected without vendor evidence.
Mitigation direction
- Upgrade Loomio to version 1.8.0 or later.
- Review Loomio 1.8.0 release notes and the referenced fixing commit.
- Check vendor guidance before applying any backport or local sanitization change.
- Limit untrusted thread and comment creation until affected instances are updated.
Validation and detection
- Inventory all Loomio deployments and record their running version.
- Confirm any affected instance is upgraded to 1.8.0 or later.
- Review whether the referenced fixing commit is present in self-managed builds.
- Check logs and content moderation queues for suspicious Markdown in threads or comments.
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-2017-11594 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://github.com/loomio/loomio/issues/4220CVE reference · x_refsource_CONFIRM
- https://github.com/loomio/loomio/releases/tag/1.8.0CVE reference · x_refsource_CONFIRM
- https://github.com/loomio/loomio/commit/63973f71e337ead8ca7b7ae2a043b837032dc3feCVE 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.