Security readout for executives and security teams
Plain-English summary
CMS Made Simple 2.2.15 lets a logged-in user with Content Manager access upload an SVG that can run script when another authenticated user views it. The business risk is compromise of administrator or editor sessions, not direct unauthenticated takeover.
Executive priority
Treat as a near-term hygiene issue for any CMS Made Simple 2.2.15 site with multiple content users. It is not presented as mass unauthenticated exploitation, but it can turn one limited CMS account into broader administrative session risk.
Technical view
This is stored XSS in CMS Made Simple 2.2.15 via SVG file upload. It requires authenticated low-privilege access and affects other authenticated users who access the uploaded file. CVSS 3.1 is 6.4 with scope changed and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to CMS Made Simple 2.2.15 instances where authenticated users can access Content Manager or file upload functionality. Risk rises on shared editorial teams, contractor accounts, or any site where lower-privileged users can upload media viewed by administrators.
Exploitation context
The bundle includes an ExploitDB reference, so public exploit information exists. The CVE is not marked KEV, and the supplied sources do not establish active exploitation in the wild. Exploitation depends on having valid CMS access and getting another authenticated user to access the stored SVG.
Researcher notes
Evidence supports affected product, version, vulnerability class, CVSS, and public exploit reference. The supplied bundle does not name a fixed version, vendor advisory details, or observed exploitation. Avoid asserting broader version impact without additional vendor or CVE evidence.
Mitigation direction
- Inventory CMS Made Simple instances and identify any running version 2.2.15.
- Check CMS Made Simple vendor downloads and guidance for an appropriate supported update.
- Restrict Content Manager and file upload permissions to trusted users only.
- Temporarily disallow SVG uploads where the platform or controls permit it.
- Review uploaded SVG files and remove suspicious or unnecessary content.
Validation and detection
- Confirm the CMS Made Simple version on each managed site.
- Review user roles with Content Manager or file upload access.
- Inspect media/file-manager storage for SVG uploads from untrusted accounts.
- Check application and web logs for recent SVG upload and access events.
- Verify remediation against vendor guidance rather than assuming a fixed version.
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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-37238 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
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:N/S:C/C:L/I:L/A:N3.12.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49199CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- Product ReferenceCVE reference, VulnCheck · product
- VulnCheck Advisory: CMS Made Simple 2.2.15 Stored XSS via SVG File UploadCVE reference, VulnCheck · third-party-advisory
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.