Security readout for executives and security teams
Plain-English summary
Popup by Supsystic versions through 1.13.0 reportedly contain a broken authentication flaw. A remote, unauthenticated attacker could make high-impact changes and disrupt an affected WordPress site. The supplied sources report no confidentiality impact, but potentially severe integrity and availability consequences.
Executive priority
Treat confirmed affected, internet-accessible sites as an immediate remediation priority because exploitation requires no authentication or user interaction. Prioritize inventory, containment, and integrity review. Do not claim compromise solely from exposure; the supplied evidence establishes vulnerability risk, not observed exploitation.
Technical view
CVE-2026-73381 is classified as CWE-288 with CVSS 3.1 score 9.1. The vector indicates network access, low complexity, no privileges, and no user interaction. Reported impact is high for integrity and availability, with none for confidentiality. Public technical detail is limited.
Likely exposure
Potential exposure is limited to WordPress sites running Popup by Supsystic through version 1.13.0. The bundle’s structured affected record says versions are unspecified and defaults to unaffected, conflicting with the title and description. Confirm installed versions and deployment status directly.
Exploitation context
The supplied bundle does not identify active exploitation, public exploit code, or inclusion in CISA KEV. KEV is marked false. This does not prove exploitation is absent; it means the provided evidence does not substantiate it.
Researcher notes
Disclosure is sparse and does not describe the authentication failure, vulnerable endpoint, attack behavior, fixed version, or indicators of compromise. The affected-version metadata conflicts with the narrative claim. Avoid inferring mechanisms or testing destructively; obtain authoritative vendor details before concluding remediation is complete.
Mitigation direction
- Identify every WordPress site with Popup by Supsystic installed or enabled.
- Check Patchstack and vendor guidance for a confirmed corrected release or official mitigation.
- Disable or remove affected versions until a verified remediation is available, where operationally feasible.
- Restrict public access to affected sites if the plugin cannot be disabled safely.
- Back up sites before remediation and monitor for unauthorized changes or disruption.
Validation and detection
- Record the plugin version and activation status on every WordPress deployment.
- Confirm whether each discovered version is 1.13.0 or earlier.
- Verify the plugin is disabled, removed, or updated according to confirmed vendor guidance.
- Review WordPress and hosting logs for unexplained administrative actions or availability events.
- Retest normal site operation after mitigation without attempting exploitation.
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-288: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2026-73381 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
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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:N/UI:N/S:U/C:N/I:H/A:H3.95.2PatchstackVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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://patchstack.com/database/wordpress/plugin/popup-by-supsystic/vulnerability/wordpress-popup-by-supsystic-plugin-1-13-0-broken-authentication-vulnerability?_s_id=cveCVE reference, Patchstack · vdb-entry
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.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.