Security readout for executives and security teams
Plain-English summary
CVE-2026-25016 is a broken access control issue in the WordPress Nelio Popups plugin through version 1.3.5. A logged-in user may be able to perform actions they should not be authorized to perform. The published impact is limited to integrity, with no confidentiality or availability impact stated.
Executive priority
Address in normal vulnerability management cycles, faster for WordPress sites with open registration, many contributors, or business-critical marketing content. The known impact is moderate because authentication is required and published impact is limited to unauthorized changes.
Technical view
The issue is CWE-862 Missing Authorization in Nelio Software Nelio Popups, package nelio-popups, affecting versions up to and including 1.3.5. CVSS 3.1 is 4.3: network reachable, low complexity, low privileges required, no user interaction, scope unchanged, low integrity impact only.
Likely exposure
Exposure is limited to WordPress sites that have Nelio Popups installed at version 1.3.5 or earlier. The CVSS vector indicates exploitation requires an authenticated account, so public self-registration or many low-privilege users increases practical risk.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked in CISA KEV. No exploit code or specific vulnerable function is described in the supplied data. Treat this as a privilege-bound application integrity risk, not an unauthenticated takeover claim.
Researcher notes
Evidence is sparse. Sources identify the weakness class, product, affected version range, and CVSS vector, but not the vulnerable endpoint, fixed version, or exploit status. Avoid assuming unauthenticated impact or full administrative compromise without additional vendor evidence.
Mitigation direction
- Identify WordPress sites running the Nelio Popups plugin.
- Check installed plugin versions and flag 1.3.5 or earlier.
- Consult Nelio Software or Patchstack guidance for a fixed version or vendor workaround.
- If no fix is available, disable the plugin where business impact allows.
- Limit low-privilege WordPress accounts and remove unused users.
Validation and detection
- Confirm whether nelio-popups is installed on each WordPress site.
- Record the plugin version and compare it to affected versions through 1.3.5.
- Review WordPress user roles with access to plugin-related functionality.
- Check vendor and Patchstack advisories for updated remediation status.
- Monitor site changes made by low-privilege accounts until remediated.
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-2026-25016 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:N/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
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.