by Kastro
Paper/Archive/CVE-2026-64829

CVE-2026-64829

q2a question2answer — Question2Answer 1.8.8 Session Fixation via Forgot-Password Flow

EPSS 0.4%CVSS 9.1
critical.is priorityof 100
35
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 36.2.362 × 207.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Question2Answer through 1.8.8 contains a session invalidation vulnerability that allows attackers with a previously obtained remember-me cookie to retain authenticated access by exploiting the forgot-password reset flow's failure to clear the sessioncode field in qa-include/app/users-edit.php. While the normal password-change flow in qa-include/pages/account.php explicitly clears the sessioncode to invalidate persistent qa_session cookies, the forgot-password handler qa_finish_reset_user() omits this step, allowing any valid persistent cookie issued before the reset to continue authenticating the account after the password reset completes.

Affected

ProductAffectedFixed inSource
question2answer≤ 1.8.8–CNA

Scores by source

VulnCheck (CNA)9.1CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchgithub.com/q2a/question2answer/pull/1017writeupvulncheck.com/advisories/question2answer-session-fixation-via-forgot-password-flowrefseclists.org/fulldisclosure/2026/Aug/32