Security readout for executives and security teams
Plain-English summary
CVE-2026-1891 affects the Simple Football Scoreboard WordPress plugin through version 1.0. A logged-in user with Contributor-level access or higher can save malicious script through scoreboard shortcode attributes. That script may run when someone views the affected page, creating account, content, or visitor-risk depending on who views it.
Executive priority
Treat as a near-term WordPress hygiene issue, not an emergency based on current evidence. Prioritize sites with many content contributors, public registration, or sensitive administrator sessions. If the plugin is unnecessary, removal is the cleanest risk reduction until vendor guidance is clear.
Technical view
The issue is stored cross-site scripting in the ytmr_fb_scoreboard shortcode, caused by insufficient sanitization and output escaping of user-supplied attributes. Wordfence rates it CVSS 6.4. It requires authenticated low-privileged access and can affect confidentiality and integrity, with changed scope. Sources do not identify a fixed version.
Likely exposure
Exposure is limited to WordPress sites using Simple Football Scoreboard version 1.0 or earlier, especially where Contributor or higher accounts are available to untrusted users. Sites without the plugin, without the shortcode, or without such accounts are less likely exposed.
Exploitation context
No cited source or KEV status indicates active exploitation. Abuse requires a valid WordPress account with Contributor-level privileges or higher and the ability to create content using the vulnerable shortcode. The impact depends on who views the injected content, including administrators.
Researcher notes
The public description attributes the flaw to shortcode attribute handling and references plugin source around line 310. Avoid assuming a patch exists; none is named in the provided sources. Validation should focus on version, role exposure, and shortcode presence rather than exploit reproduction.
Mitigation direction
- Check vendor or WordPress plugin guidance for a fixed release or official mitigation.
- Update the plugin if a patched version becomes available.
- Disable or remove the plugin if it is not business-critical.
- Restrict Contributor and higher roles to trusted users only.
- Review existing content using the ytmr_fb_scoreboard shortcode.
Validation and detection
- Inventory WordPress sites for Simple Football Scoreboard installations.
- Confirm installed plugin versions are 1.0 or earlier.
- Identify users with Contributor, Author, Editor, or Administrator roles.
- Search published and draft content for ytmr_fb_scoreboard shortcode usage.
- Review vendor and Wordfence advisories for updated remediation status.
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-2026-1891 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
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/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/48c114d7-3d53-4157-a335-19cf4b47eed5?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/simple-football-score-board/trunk/ytmr_simple_football_scoreboard.php#L310CVE reference
- https://plugins.trac.wordpress.org/browser/simple-football-score-board/tags/1.0/ytmr_simple_football_scoreboard.php#L310CVE 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.