Security readout for executives and security teams
Plain-English summary
A low-privileged Adobe Experience Manager user could store malicious script content in vulnerable form fields. The script may run when another user views the affected page, potentially exposing browser-accessible information or allowing limited actions as that victim. Successful exploitation requires both authenticated access and victim interaction.
Executive priority
Schedule remediation through the normal vulnerability process, prioritizing internet-facing or multi-author AEM environments. Escalate where low-trust accounts can publish content viewed by privileged staff or customers. Emergency response is not supported by the supplied exploitation evidence.
Technical view
CVE-2026-27255 is stored cross-site scripting (CWE-79) affecting Adobe Experience Manager. It is remotely reachable, low complexity, requires low privileges and user interaction, and can cross a security boundary. CVSS 3.1 is 5.4, with low confidentiality and integrity impact and no availability impact.
Likely exposure
The clearest exposure is AEM 6.5.23 and earlier where low-privileged users can submit content to vulnerable form fields. Risk increases when untrusted or broadly assigned author accounts can create content viewed by administrators, editors, customers, or other privileged users.
Exploitation context
The bundle does not report known active exploitation, and the CVE is not listed as KEV. Exploitation requires an attacker with low-level privileges to store malicious content and a victim to visit the affected page. No exploit availability evidence is provided.
Researcher notes
The supplied description explicitly identifies AEM 6.5.23 and earlier. Structured data also references Cloud Service 2026.2.0, 6.5 LTS SP2, and AEM 6.5.24, but its range representation is ambiguous. Confirm exact affected and fixed boundaries in Adobe APSB26-24 before closing findings.
Mitigation direction
- Upgrade AEM 6.5 to 6.5.24 or later, following Adobe APSB26-24.
- Confirm Cloud Service and 6.5 LTS remediation requirements directly against Adobe APSB26-24.
- Restrict form-content authoring to trusted accounts until remediation is verified.
- Review stored form content for unexpected scripts, event handlers, or embedded active content.
Validation and detection
- Inventory deployed AEM editions and versions, including Cloud Service and 6.5 LTS environments.
- Confirm installed release or service-pack status against Adobe APSB26-24.
- Identify roles permitted to write content into form fields and remove unnecessary access.
- Verify vulnerable fields reject or encode suspicious markup in staging using non-executable test strings.
- Review affected pages and audit records for unusual stored content or authoring 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-2026-27255 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.