Security readout for executives and security teams
Plain-English summary
A vulnerable WordPress plugin can let an attacker abuse an administrator’s browser to change plugin settings and store malicious script on the site. The attacker must convince an admin to take an action, such as clicking a link. This is not listed as known exploited in KEV.
Executive priority
Treat as a moderate-priority WordPress hygiene issue. It can affect website integrity and visitor trust, but exploitation requires administrator interaction. Prioritize sites with public visibility, many administrators, or high brand impact.
Technical view
Auto Post Scheduler for WordPress, versions up to and including 1.84, lacks nonce validation in aps_options_page. This enables unauthenticated CSRF that can update settings and inject stored cross-site scripting when an authenticated administrator is tricked into submitting a forged request.
Likely exposure
Exposure is limited to WordPress sites with Auto Post Scheduler installed at version 1.84 or earlier. Risk depends on administrator interaction and whether vulnerable settings are reachable in the deployed configuration.
Exploitation context
The CVSS score is 6.1. Exploitation requires no attacker account but does require administrator user interaction. Public sources provided do not state active exploitation or a confirmed weaponized exploit.
Researcher notes
The reported root cause is missing nonce validation in aps_options_page, producing CSRF that can lead to stored XSS. CWE is listed as CWE-79. The provided sources do not identify a fixed version, so remediation should follow vendor guidance.
Mitigation direction
- Inventory WordPress sites for Auto Post Scheduler version 1.84 or earlier.
- Check the plugin vendor and Wordfence pages for updated remediation guidance.
- Disable or remove the plugin if it is not business-critical.
- Warn administrators against clicking unsolicited links while logged into WordPress.
Validation and detection
- Confirm whether Auto Post Scheduler is installed on each WordPress site.
- Record installed plugin versions and compare against affected versions through 1.84.
- Review plugin settings for unexpected changes or injected script content.
- Check web and WordPress logs for suspicious administrator setting updates.
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-2026-1877 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.