Security readout for executives and security teams
Plain-English summary
A low-privileged user could save malicious browser code in vulnerable Adobe Experience Manager form fields. The code may run when another user views the affected page, potentially exposing limited information or enabling unauthorized actions in that user’s browser. Victim interaction is required, and the sources do not report availability impact.
Executive priority
Schedule prompt remediation through normal vulnerability-management channels. Escalate priority for internet-facing or widely used AEM sites where low-privileged users can author content, especially when privileged staff commonly view that content. Emergency treatment is not supported by the supplied exploitation evidence.
Technical view
CVE-2026-27251 is stored cross-site scripting (CWE-79) with CVSS 3.1 score 5.4. Exploitation is network-accessible, low complexity, requires low privileges and victim interaction, and crosses a security boundary. Expected impact is low confidentiality and integrity loss without availability loss.
Likely exposure
Exposure depends on the AEM product line, deployed version, and whether untrusted low-privileged users can populate vulnerable form fields. The bundle explicitly describes AEM 6.5.23 and earlier as affected, but its structured version boundaries are inconsistent; confirm exact applicability against Adobe’s advisory.
Exploitation context
The provided sources do not establish active exploitation, and this CVE is not listed as KEV in the bundle. Abuse requires an authenticated low-privileged attacker to store malicious content and a victim to visit the affected page. No evidence provided here establishes public exploit availability.
Researcher notes
The CVSS vector is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The narrative says AEM 6.5.23 and earlier, while structured affected data references Cloud Service 2026.2.0, 6.5 LTS SP2, and 6.5.24 boundaries with default unaffected status. Treat Adobe’s advisory as authoritative for version mapping.
Mitigation direction
- Review Adobe advisory APSB26-24 and apply the vendor-recommended update for the deployed AEM product line.
- Prioritize instances where low-privileged or externally sourced users can submit content into form fields.
- Restrict unnecessary authoring permissions until remediation is complete.
- Review affected content and accounts for suspicious changes after updating.
Validation and detection
- Inventory AEM product lines and exact deployed versions.
- Compare each deployment against Adobe advisory APSB26-24 because the bundled version boundaries are inconsistent.
- Confirm the vendor-recommended update is installed across all applicable nodes and environments.
- Verify affected fields safely encode or reject script-capable input after remediation.
- Review audit records for unexpected form-field changes by low-privileged accounts.
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-2026-27251 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.