Security readout for executives and security teams
Plain-English summary
CVE-2025-23891 is a medium-severity cross-site scripting issue in the WordPress Yet Another Countdown plugin through version 1.0.1. A successful attack could cause script execution in a user’s browser, potentially affecting session data or page integrity. Public sources do not show active exploitation.
Executive priority
Treat this as a targeted web application hygiene issue, not an emergency. Prioritize sites using the plugin, especially public WordPress properties with delegated content editing or sensitive authenticated users.
Technical view
The CVE describes improper input neutralization during web page generation, classified as CWE-79 DOM-based XSS. The CVSS 3.1 score is 6.5 with network attack vector, low complexity, low privileges required, user interaction required, changed scope, and low C/I/A impact.
Likely exposure
Exposure is likely limited to WordPress sites running Yet Another Countdown, package yacp, at version 1.0.1 or earlier. Sites without this plugin are not indicated as affected by the provided sources.
Exploitation context
The source bundle does not cite KEV listing or active exploitation. The CVSS vector indicates an attacker needs some privileges and user interaction, so risk depends on who can submit affected plugin content and who later views it.
Researcher notes
Evidence is sparse. The bundle identifies DOM-based XSS and CVSS details, but does not provide a patch version, vulnerable parameter, proof of concept, or exploitation telemetry. Avoid assuming broader WordPress impact beyond the named plugin.
Mitigation direction
- Inventory WordPress sites for the Yet Another Countdown plugin.
- Identify whether installed versions are 1.0.1 or earlier.
- Check vendor and Patchstack guidance for an official fixed release.
- If no safe fixed release exists, disable or remove the plugin.
- Limit plugin content editing to trusted administrators only.
Validation and detection
- Review WordPress plugin inventories across production and staging.
- Confirm the installed plugin slug or package is yacp.
- Compare installed versions against the affected range through 1.0.1.
- Review relevant pages for unexpected script content or suspicious changes.
- Recheck CVE and Patchstack records for updated remediation details.
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-2025-23891 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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.
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:L/UI:R/S:C/C:L/I:L/A:L2.33.7PatchstackVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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/yacp/vulnerability/wordpress-yet-another-countdown-plugin-plugin-1-0-1-cross-site-scripting-xss-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.
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.