Security readout for executives and security teams
Plain-English summary
CVE-2023-40000 is a high-severity stored cross-site scripting flaw in the WordPress LiteSpeed Cache plugin through version 5.7. An unauthenticated attacker could inject script content that persists across the site, creating risk to visitors, administrators, and site integrity.
Executive priority
Treat this as a near-term remediation item for any public WordPress site using LiteSpeed Cache. The risk is site-wide stored script injection without authentication, but the provided evidence does not prove active exploitation.
Technical view
The issue is CWE-79 improper input neutralization during page generation in LiteSpeed Cache. The CVSS 3.1 score is 8.3 with network access, low complexity, no privileges, and no user interaction required. Scope is changed with limited confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to WordPress sites running LiteSpeed Cache version 5.7 or earlier. The bundle does not identify affected hosting platforms, configurations, or downstream products beyond the plugin package name litespeed-cache.
Exploitation context
The CVE is not listed as CISA KEV in the bundle. A public GitHub reference is tagged as exploit, so public exploit material may exist, but the provided sources do not establish active exploitation in the wild.
Researcher notes
The source bundle identifies affected versions only as through 5.7 and includes a public exploit-tagged GitHub reference. It does not provide root-cause code details, a specific patched version, or confirmed exploitation telemetry.
Mitigation direction
- Inventory WordPress sites using LiteSpeed Cache.
- Upgrade LiteSpeed Cache beyond version 5.7 following vendor guidance.
- Disable or remove the plugin if timely upgrade is not possible.
- Review vendor and Patchstack guidance for any named remediation steps.
- Harden WordPress administrator sessions and monitor for unexpected content changes.
Validation and detection
- Check installed LiteSpeed Cache plugin versions across WordPress estates.
- Confirm no site remains on version 5.7 or earlier.
- Review pages and stored content for unexpected script injection.
- Inspect WordPress users, administrator sessions, and recent content changes.
- Validate remediation in staging before production rollout where possible.
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-2023-40000 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
- High
- CVSS
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:N/UI:N/S:C/C:L/I:L/A:L3.93.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/vulnerability/litespeed-cache/wordpress-litespeed-cache-plugin-5-7-unauthenticated-site-wide-stored-xss-vulnerability?_s_id=cveCVE reference · vdb-entry
- https://github.com/rxerium/CVE-2023-40000CVE reference · exploit
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.