CVE-2026-12134 | JoomSport <= 5.7.8 - Authenticated (Subscriber+) Missing Authorization to Arbitrary Group Creation/Modification via season_groupedit AJAX action

The JoomSport – for Sports: Team & League, Football, Hockey & more plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 5.7.8. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to create arbitrary season groups or modify existing group names, participants, and round-type options. Exploitation requires obtaining the joomsportajaxnonce, which is exposed on frontend pages that render a JoomSport shortcode.

Published: 2026-07-02 Last update: 2026-07-02 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2026-12134 is rated Low Risk (21.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.23%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-12134

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-03 0.40% 0.23% -0.17%
2 2026-07-02 0.40%

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-12134

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
2.8 1.4 [email protected]

Weakness enumeration for CVE-2026-12134

GitHub Security Advisory for CVE-2026-12134

GHSA-h398-fp2w-9mpg · Severity: medium — The JoomSport – for Sports: Team & League, Football, Hockey & more plugin for WordPress is...

Affected software / configurations for CVE-2026-12134

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-12134

URL Tags
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/tags/5.7.8/includes/joomsport-shortcodes.php#L473
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/tags/5.7.8/includes/posts/joomsport-post-season.php#L22
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/tags/5.7.8/includes/posts/joomsport-post-season.php#L230
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/trunk/includes/joomsport-shortcodes.php#L473
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/trunk/includes/posts/joomsport-post-season.php#L22
https://plugins.trac.wordpress.org/browser/joomsport-sports-league-results-management/trunk/includes/posts/joomsport-post-season.php#L230
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3581673%40joomsport-sports-league-results-management&new=3581673%40joomsport-sports-league-results-management&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/a00997d4-f242-4d49-8542-0738efa66222?source=cve
cvelogic Threat Intelligence