Security readout for executives and security teams
Plain-English summary
This CVE affects Adobe Experience Manager installations where trusted users can access the Content Repository Development Environment. A user with that access could save malicious script content into certain repository fields. Another user who later views a page containing that field could have the script run in their browser.
Executive priority
Treat this as a targeted AEM hardening and patching item, not a mass-exploitation emergency based on the supplied evidence. Prioritize older production AEM systems and environments with broad administrator or developer access.
Technical view
CVE-2020-9738 is a stored cross-site scripting issue in Adobe Experience Manager. Affected versions include 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. The CVSS 3.1 score is 6.8 with high privileges required and victim interaction required.
Likely exposure
Exposure is most likely in organizations running older AEM versions with Content Repository Development Environment access granted beyond a tightly controlled administrator group. The issue is less likely to be internet-wide directly, because exploitation requires authenticated high-privilege access and victim interaction.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The risk is insider, compromised-admin, or over-permissioned-user abuse, followed by browser execution when another user visits content containing the affected field.
Researcher notes
Key constraints are PR:H and UI:R: an attacker needs high-privilege AEM access, and execution depends on a victim viewing affected content. The sources do not provide exploit details, active exploitation evidence, or explicit fixed versions beyond the Adobe advisory reference.
Mitigation direction
- Check Adobe APSB20-56 and apply vendor-supported security updates or remediation guidance.
- Restrict Content Repository Development Environment access to essential trusted administrators only.
- Inventory AEM versions and prioritize instances at or below the affected release levels.
- Review privileged AEM accounts for unnecessary repository development access.
- Monitor for suspicious script-like content in repository fields.
Validation and detection
- Confirm whether any AEM instance runs an affected version listed in the CVE.
- Verify who has Content Repository Development Environment access in each environment.
- Review repository content for unexpected script entries in editable node fields.
- Check whether Adobe advisory remediation has been applied and documented.
- Confirm no public route or workflow unnecessarily exposes vulnerable rendered fields.
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-2020-9738 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.