Security readout for executives and security teams
Plain-English summary
CVE-2026-27091 is a broken access control issue in the WordPress UiPress lite plugin through version 3.5.09. A logged-in user could access functionality they should not be authorized to use, potentially affecting confidentiality, integrity, and availability at a limited level.
Executive priority
Treat as a medium-priority WordPress plugin issue. Prioritize environments with many user accounts, customer logins, contractors, authors, or other low-trust authenticated users. Escalate if UiPress publishes a fix or if exploitation evidence appears.
Technical view
The CVE describes CWE-862 Missing Authorization in UiPress lite uipress-lite <= 3.5.09. CVSS 3.1 is 6.3: network-accessible, low complexity, low privileges required, no user interaction, unchanged scope, and low C/I/A impact.
Likely exposure
Exposure is likely limited to WordPress sites running UiPress lite through 3.5.09, especially where untrusted or lower-privileged users can log in. Sites without this plugin, or running versions outside the affected range, are not indicated as affected by the provided sources.
Exploitation context
No CISA KEV listing is provided, and the source bundle does not cite active exploitation. The vulnerability still matters because authenticated low-privilege access is common on membership, editorial, customer, or multi-user WordPress sites.
Researcher notes
The public data names the vulnerability class and affected range but does not include detailed vulnerable functions, proof of concept, exploit activity, or a confirmed fixed version in the provided bundle. Avoid assuming unauthenticated impact; CVSS indicates privileges are required.
Mitigation direction
- Inventory WordPress sites for the UiPress lite plugin.
- Identify installations running UiPress lite 3.5.09 or earlier.
- Check UiPress and Patchstack guidance for fixed versions or vendor mitigations.
- Restrict low-privilege account creation where business processes allow.
- Review plugin permissions and remove unnecessary user access.
Validation and detection
- Confirm plugin presence and version across WordPress assets.
- Review whether untrusted users can authenticate to affected sites.
- Check vendor or Patchstack records for remediation status.
- Verify access controls after updating or applying vendor guidance.
- Monitor WordPress logs for unusual low-privilege administrative 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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-27091 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
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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:N/S:U/C:L/I:L/A:L2.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.