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Vulnerability details

CVE-2026-102772

jtsternberg CMB2

CMB2 <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'textarea_code' Field

CVSS 3.1
7.2High

Official description

The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '<textarea_code field id> (e.g. kl_code, kl_post_code)' parameter in all versions up to, and including, 2.13.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The front-end save path requires only a CMB2 box nonce, which is emitted to all visitors including unauthenticated guests via a simple GET request, making the attack trivially reachable without any credentials on sites that expose a public CMB2 form writing a textarea_code field.

CVSS scores

ScoreVersionSourceVector
7.2High 3.1 CVEProject cvelistV5 (CNA) (Wordfence) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

VendorProductVersionsSource
jtsternberg CMB2 v ≤ 2.13.1 CVEProject cvelistV5 (CNA)

References and advisories

6
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Details

Published
2026-10-02
Last updated
2026-10-03
State
Published
Assigner (CNA)
Wordfence

Exploit prediction (EPSS)

0.3%
Probability of exploitation in 30 days
23.5%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

  • CWE-79
    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')