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Fencer Vulns
medium 4.3

CVE-2026-91010 json

Invisible Anti-Spam & CAPTCHA < 5.1.1 - Subscriber+ Arbitrary Form Submission Deletion

published 2026-09-17 53 d ago modified 2026-09-18 51 d ago also EUVD-2026-81353

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits
0
none known

Summary

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.

Patch / fix

  • Unknown Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms 5.1.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
52 d ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/08860091-c3e4-43f1-b2e2-82fb8d45a5fa/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

  • Unknown Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.