Security readout for executives and security teams
Plain-English summary
CVE-2026-1843 affects the WordPress Super Page Cache plugin up to version 5.2.2. An unauthenticated attacker may store malicious scripts through the Activity Log, causing code to run in a visitor’s browser when affected content is viewed. This can support session theft, phishing, or admin-targeted actions, depending on who views the injected content.
Executive priority
Treat as high priority for WordPress environments using this caching plugin. The bug is unauthenticated and stored, which increases business risk, especially where admins access affected pages. Prioritize inventory, version verification, and vendor-guided remediation. No active exploitation is confirmed by the supplied sources.
Technical view
The issue is stored cross-site scripting, CWE-79, caused by insufficient input sanitization and output escaping in the plugin Activity Log. The CVSS 3.1 score is 7.2 with network attack vector, low complexity, no privileges required, and changed scope. Public sources identify versions up to and including 5.2.2 as affected.
Likely exposure
Exposure is likely limited to WordPress sites with Super Page Cache installed at version 5.2.2 or earlier. Sites where administrators review Activity Log content may face higher practical risk. The provided sources do not identify non-WordPress products as affected.
Exploitation context
The CVE record says exploitation requires no authentication and no user interaction in the CVSS vector. However, harmful browser execution occurs when a user accesses an injected page or log-related content. CISA KEV status is false in the provided data, and no cited source confirms active exploitation.
Researcher notes
There is a minor data inconsistency: the affected object lists defaultStatus as unaffected and version "0", while the title and description state Super Page Cache through 5.2.2 is vulnerable. Rely on the narrative CVE description, Wordfence reference, and WordPress changeset for triage. No exploit details should be needed for validation.
Mitigation direction
- Identify all WordPress sites using Super Page Cache.
- Upgrade if the vendor or WordPress plugin repository provides a fixed release.
- If no fixed release is available, consider disabling the plugin temporarily.
- Review vendor guidance and the referenced WordPress changeset before production changes.
- Remove suspicious Activity Log content after remediation, if found.
- Monitor administrator sessions and site integrity for XSS-related indicators.
Validation and detection
- Check installed Super Page Cache versions across all WordPress assets.
- Flag installations running version 5.2.2 or earlier.
- Review Activity Log entries for unexpected script-like content.
- Confirm the plugin update or mitigation is active in WordPress.
- Retest page and log rendering for proper escaping after remediation.
- Document any evidence of suspicious access or administrator impact.
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-2026-1843 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
- 7.2 (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: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:N/UI:N/S:C/C:L/I:L/A:N3.92.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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.