Security readout for executives and security teams
Plain-English summary
Adobe Experience Manager had a stored cross-site scripting issue in its Content Repository Development Environment. A user who already has access could save malicious script content in certain repository node fields, which may run in another user’s browser when they view the affected page.
Executive priority
Treat this as a moderate-priority AEM administration risk. It is less likely to be mass-exploited than an unauthenticated flaw, but successful misuse could compromise privileged browser sessions and sensitive AEM data.
Technical view
CVE-2020-9737 is CWE-79 stored XSS affecting AEM 6.5.5.0 and below, 6.4.8.1 and below, 6.3.3.8 and below, and 6.2 SP1-CFP20 and below. CVSS 3.1 is 6.8 with network access, low complexity, high privileges required, user interaction required, and high confidentiality, integrity, and availability impacts.
Likely exposure
Exposure is most likely in AEM environments where the Content Repository Development Environment is available to authenticated administrative or developer users. This is not described as an unauthenticated public-site issue in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires a user with access to store malicious content and a victim to open a page containing the vulnerable field.
Researcher notes
The key constraints are PR:H and UI:R. Focus validation on access paths to the Content Repository Development Environment, affected AEM versions, and whether stored script content can persist in vulnerable node fields. Evidence for exploit activity is incomplete in the provided bundle.
Mitigation direction
- Review Adobe APSB20-56 for vendor-approved update or remediation guidance.
- Restrict Content Repository Development Environment access to trusted users only.
- Remove unnecessary high-privilege AEM accounts and review role assignments.
- Monitor repository content for unexpected script-like entries in editable node fields.
Validation and detection
- Inventory AEM deployments and compare versions against the affected version ranges.
- Confirm whether Content Repository Development Environment is enabled or reachable.
- Review which users can edit repository node fields in affected environments.
- Verify remediation status against Adobe’s advisory and internal change records.
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-2020-9737 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
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
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:H/UI:R/S:U/C:H/I:H/A:H0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/experience-manager/apsb20-56.htmlCVE 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.
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.