Security readout for executives and security teams
Plain-English summary
A stored cross-site scripting flaw in Adobe Experience Manager can let a permitted user place malicious JavaScript in a vulnerable form field. The script may run when another person views the affected page, potentially exposing browser-accessible information or allowing actions with that viewer’s privileges.
Executive priority
Treat this as a scheduled but prompt remediation item. Prioritize externally reachable instances and systems where less-trusted authors can create content viewed by administrators. Escalate if suspicious stored content or browser-side activity is discovered.
Technical view
CVE-2026-27229 is a stored XSS vulnerability classified as CWE-79. It is remotely reachable, requires low privileges and victim interaction, and can cross a security boundary. CVSS 3.1 scores it 5.4, with limited confidentiality and integrity impact and no stated availability impact.
Likely exposure
Exposure is most likely where affected AEM forms accept and retain input from low-privileged users, then display it to other users. Internet-accessible environments and pages viewed by administrators or content editors warrant closer attention. The bundle explicitly identifies AEM 6.5.23 and earlier; other listed release boundaries are ambiguous.
Exploitation context
The attacker must have low-level privileges to store content, and a victim must visit the page containing it. No active exploitation is established: the source bundle marks the CVE as absent from KEV and provides no cited evidence of exploitation in the wild.
Researcher notes
The vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The scope change reflects execution in another user’s browser context. The bundle clearly states the 6.5 boundary, but its Cloud Service and 6.5 LTS version arrays do not express comparison operators; confirm those lines against Adobe’s advisory.
Mitigation direction
- Review Adobe advisory APSB26-24 for the applicable fixed release and deployment-specific instructions.
- Upgrade affected AEM installations to an Adobe-supported release outside the vulnerable range.
- Restrict form submission and content-authoring privileges until remediation is complete.
- Review stored form content for unexpected scripts or suspicious markup.
Validation and detection
- Inventory AEM Cloud Service, 6.5 LTS, and 6.5 deployments and record exact versions.
- Confirm AEM 6.5 systems are not running version 6.5.23 or earlier.
- Use Adobe APSB26-24 to interpret Cloud Service and LTS version applicability.
- Verify untrusted stored form values are safely encoded when rendered.
- Review relevant content changes and access logs for suspicious activity.
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-2026-27229 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.
SSVC decision data
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:N2.32.7adobeVulnerability 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
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
- https://helpx.adobe.com/security/products/experience-manager/apsb26-24.htmlCVE reference, adobe · vendor-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.