Security readout for executives and security teams
Plain-English summary
Adobe Experience Manager 6.5.9.0 and earlier can store malicious script through Content Fragment creation. If a victim later views the affected page, that script can run in their browser, potentially affecting confidentiality and integrity.
Executive priority
Treat this as a moderate priority for AEM environments, especially public-facing or broadly administered authoring platforms. It is not KEV-listed in the supplied data, but it can affect trusted users who view compromised content.
Technical view
CVE-2021-40711 is a stored cross-site scripting issue in Adobe Experience Manager Content Fragments. The CVSS 3.1 score is 5.4, with network access, low complexity, low privileges, required user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is most likely where Adobe Experience Manager 6.5.9.0 or earlier is deployed and authenticated users can create or modify Content Fragments that other users view.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated access and a victim viewing content containing the vulnerable field.
Researcher notes
Evidence supports stored XSS in AEM Content Fragments with authenticated attacker prerequisites. The source text mentions arbitrary code execution, but the described execution is malicious JavaScript in a victim browser, not confirmed server-side code execution.
Mitigation direction
- Identify Adobe Experience Manager deployments and confirm whether versions are 6.5.9.0 or earlier.
- Review Adobe APSB21-82 for the vendor-supported update or mitigation path.
- Limit Content Fragment creation and editing to trusted users until remediation is complete.
- Review existing Content Fragments for unexpected script-like content or suspicious changes.
Validation and detection
- Confirm the installed Adobe Experience Manager version against the affected range.
- Check whether Content Fragment creation is available to low-privileged authenticated users.
- Review logs and content history for unusual Content Fragment POST activity.
- Verify remediation status against Adobe APSB21-82 after applying vendor guidance.
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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40711 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
- 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://helpx.adobe.com/security/products/experience-manager/apsb21-82.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.