CVE-2026-85586 json
phpMyFAQ before 4.1.8 CAPTCHA Bypass via store parameter
published 2026-09-04 2 mo ago modified 2026-09-10 59 d ago also EUVD-2026-71009
- cvss
- 6.9
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.
Patch / fix
- thorsten phpMyFAQ 4.1.8
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 59 d ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- thorsten phpMyFAQ
Classification
- Weakness
-
- CWE-799 Improper Control of Interaction Frequency
References
-
github.com
/thorsten/phpMyFAQ/security/advisories/GHSA-72vj-pvm4-mm7x
vendor-advisory
-
vulncheck.com
/advisories/phpmyfaq-before-4.1.8-captcha-bypass-via-store-parameter
third-party-advisory
Sources
- CVE List CVE-2026-85586
- NVD CVE-2026-85586
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