CVE-2026-121866: Privilege Escalation (CVSS 8.8)

Description

The iLeads SMS Gateway by Exsile WordPress plugin before 2.0.0 does not check capabilities or nonces in several AJAX actions that update a site option chosen by the request, allowing any authenticated user, such as a subscriber, to change arbitrary WordPress options and escalate to administrator, for example by enabling registration with administrator as the default role.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0023

Probability of exploitation

0.14%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-269 CWE-269

References

Other References

https://wpscan.com/vulnerability/b1fca9ef-8839-4030-88ab-c2bcdd79f488/

Frequently Asked Questions

What is CVE-2026-121866? +

The iLeads SMS Gateway by Exsile WordPress plugin before 2.0.0 does not check capabilities or nonces in several AJAX actions that update a site option chosen by the request, allowing any authenticated user, such as a subscriber, to change arbitrary WordPress options and escalate to administrator, for example by enabling registration with administrator as the default role. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-121866? +

CVE-2026-121866 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0023, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-121866? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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