Security readout for executives and security teams
Plain-English summary
Composr CMS 10.0.34 has a stored cross-site scripting issue in banner management. A logged-in administrator can place malicious script content in a banner description, causing it to run for visitors on the home page. This mainly matters where administrator accounts are shared, weakly protected, or already compromised.
Executive priority
Prioritize remediation for public-facing Composr sites, especially if administrator access is broad or weakly protected. This is not a critical unauthenticated takeover based on current evidence, but stored XSS can affect visitors and damage trust if an admin account is abused.
Technical view
The issue is CWE-79 persistent XSS in Composr CMS 10.0.34 Add banner Description handling. CVSS 3.1 is 6.4 with network access, low complexity, low privileges, no user interaction, changed scope, and low confidentiality/integrity impact. Sources identify an ExploitDB reference but no KEV listing or active exploitation evidence.
Likely exposure
Exposure is limited to sites running Composr CMS 10.0.34 with reachable administrator functionality. The attacker needs administrator credentials, so highest risk is from compromised admin accounts, excessive admin access, or weak administrative controls.
Exploitation context
A public ExploitDB reference exists, indicating public technical detail. The provided sources do not show CISA KEV status or confirmed active exploitation. Treat it as a credible stored XSS risk, not as proven in-the-wild exploitation.
Researcher notes
The record names only Composr CMS 10.0.34. Do not generalize to other versions without vendor confirmation. Patch information is not included in the supplied evidence, so validation should focus on version, banner content handling, and vendor guidance.
Mitigation direction
- Inventory Composr CMS installations and confirm whether version 10.0.34 is in use.
- Restrict administrator access and require strong authentication until vendor guidance is verified.
- Review banner descriptions for unauthorized or unexpected script-like content and remove suspicious entries.
- Check Composr guidance and downloads for a fixed release or official mitigation.
- Increase monitoring for unusual changes to banner content and administrator accounts.
Validation and detection
- Confirm product and version from administrative inventory or deployment records.
- Review banner records, especially Description fields, for unexpected active content.
- Check web logs for recent administrator changes to banners.
- Verify whether home page content renders stored banner descriptions to unauthenticated visitors.
- Document whether any compensating controls limit administrator account compromise impact.
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-2020-37237 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-49190CVE reference, VulnCheck · exploit
- Official Product HomepageCVE reference, VulnCheck · product
- Product ReferenceCVE reference, VulnCheck · product
- VulnCheck Advisory: Composr CMS 10.0.34 Persistent Cross-Site Scripting via bannersCVE 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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.