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VulnerabilityPublished

CVE-2026-91010: Invisible Anti-Spam & CAPTCHA (WordPress plugin) · Missing Authorization

Affects Invisible Anti-Spam & CAPTCHA (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium : upgrade to 5.1.1 when convenient.

Data as of 1 Nov 2026, 08:20 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.1.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Upgrade Invisible Anti-Spam & CAPTCHA (WordPress plugin) to 5.1.1.

Affected software

ProductAffectedFixed in
Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All FormsAffected
  • >=2.0.5 <5.1.1
Fixed in
  • 5.1.1

AI-suggested

Upgrade the Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms WordPress plugin to version 5.1.1 or later, where this authorization issue is fixed. Until then, restrict user roles that can authenticate on the site to trusted users only.

Description

The Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 does not check the user's capabilities in its message deletion AJAX action, and only tests that a nonce parameter is present rather than validating it, allowing any authenticated user, such as a subscriber, to permanently delete every form submission the Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 has stored.

References

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