Security readout for executives and security teams
Plain-English summary
CVE-2026-2499 is a stored cross-site scripting issue in the WordPress Custom Logo plugin. An administrator-level user could save a malicious logo path that runs script when affected pages are viewed. Business urgency is limited by the need for admin privileges and specific WordPress configurations, but impacted sites should still review exposure.
Executive priority
Treat as a routine but real WordPress hygiene issue. Prioritize sites with many administrators, multisite configurations, or sensitive user sessions. It is not currently evidenced as actively exploited, but persistent XSS can become serious after administrator account compromise.
Technical view
The issue is insufficient input sanitization and output escaping in the Custom Logo plugin’s admin logo path setting, affecting versions up to and including 2.2 per the provided description. It is CWE-79 with CVSS 3.1 score 4.4. Scope is limited to multisite installations and installations where unfiltered_html has been disabled.
Likely exposure
Exposure is likely limited to WordPress sites using Custom Logo version 2.2 or earlier, with multisite enabled or unfiltered_html disabled. Attackers require administrator-level permissions or higher, so risk is highest where admin accounts are shared, weakly protected, or compromised.
Exploitation context
No CISA KEV listing is provided, and the supplied sources do not state active exploitation. The vulnerability requires high privileges but can create persistent script execution for users visiting affected pages, potentially enabling session or content manipulation within the site context.
Researcher notes
The affected-version data in the bundle is inconsistent: the description says versions through 2.2, while the affected object lists version 0 with defaultStatus unaffected. Rely on vendor/CVE references for confirmation before broad enforcement. No exploit details or fixed release information were provided in the bundle.
Mitigation direction
- Check vendor and WordPress plugin guidance for a fixed version or official remediation.
- Update the Custom Logo plugin if a newer trusted release is available.
- Disable or remove the plugin if it is not required.
- Restrict and review WordPress administrator accounts.
- Use MFA and strong access controls for WordPress administrators.
Validation and detection
- Inventory WordPress sites for the Custom Logo plugin.
- Identify plugin versions up to and including 2.2.
- Confirm whether multisite is enabled or unfiltered_html is disabled.
- Review the logo path setting for unexpected script-like content.
- Check admin audit logs for recent settings changes.
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-2026-2499 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
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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.
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:H/PR:H/UI:N/S:C/C:L/I:L/A:N1.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/92705581-9a0d-4d23-9118-fec9100e4ce1?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/custom-logo/trunk/custom-logo.php#L18CVE reference
- https://plugins.trac.wordpress.org/browser/custom-logo/tags/2.2/custom-logo.php#L18CVE reference
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.