Security readout for executives and security teams
Plain-English summary
CVE-2018-19918 is a stored cross-site scripting issue in CuppaCMS involving SVG uploads through an administrator table manager view. An attacker with access to upload content could cause script execution when another user views the uploaded SVG. Business impact is mainly admin-session compromise, data exposure, or unauthorized content changes within the CMS.
Executive priority
Treat as moderate priority. It is not known to be actively exploited, but it affects administrative CMS workflows and could compromise trusted users if vulnerable upload paths are exposed. Prioritize environments with multiple content editors or internet-facing admin access.
Technical view
The CVE describes CWE-79 XSS via an SVG document uploaded to `administrator/#/component/table_manager/view/cu_views`. CVSS 3.1 is 5.4 with network access, low complexity, low privileges, required user interaction, changed scope, low confidentiality and integrity impact, and no availability impact. Sources do not identify affected versions or a confirmed patch.
Likely exposure
Exposure is likely limited to CuppaCMS deployments where authenticated users can access the administrator table manager upload path and upload SVG files. The source bundle does not provide affected version ranges, CPEs, or deployment prevalence, so inventory confirmation is required.
Exploitation context
The source bundle contains public references, but CISA KEV status is false and no cited source states active exploitation. Exploitation requires some level of privilege and user interaction, consistent with stored XSS triggered when a victim views the uploaded SVG content.
Researcher notes
Evidence is sparse: affected vendor/product metadata is `n/a`, and the bundle does not name vulnerable versions or a patch. Analysis should stay tied to the described CuppaCMS admin URI, SVG upload behavior, CWE-79 classification, CVSS vector, and public GitHub references.
Mitigation direction
- Check CuppaCMS issue and vendor guidance for patch or fixed-version information.
- Temporarily disallow SVG uploads in affected administrator workflows if business permits.
- Restrict table manager access to trusted authenticated users only.
- Review existing uploaded SVG files and remove untrusted content.
- Consider isolating user-uploaded files from authenticated CMS sessions.
Validation and detection
- Inventory whether CuppaCMS is used in any internet-facing or internal sites.
- Confirm whether the administrator table manager upload path exists and is reachable.
- Review CMS roles allowed to upload SVG or manage views.
- Check for existing uploaded SVG files in CMS-managed content.
- Verify vendor guidance or issue history before marking remediation complete.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2018-19918 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/security-breachlock/CVE-2018-19918/blob/master/cuppa_svg.pdfCVE reference · x_refsource_MISC
- https://github.com/CuppaCMS/CuppaCMS/issues/3CVE 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.