cve.bz

CVE-2026-129134 MRBS before 1.13.0 Password Reset Poisoning via Host Header Injection

8.6 high

High (8.6) in meeting-room-booking-system mrbs-code.

On this page
MRBS before 1.13.0 contains a password reset poisoning vulnerability that allows unauthenticated attackers to redirect reset links by forging the Host header when $url_base is unset. Attackers can request a reset for a victim so AuthDb::notifyUser() emails a link pointing to their host, capturing the reset key when opened to take over accounts including administrators.

Severity

CVSS 4.0

8.6 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

8.1 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE
CWE-640 Weak Password Recovery Mechanism for Forgotten Password
OWASP Top 10
A07:2025 Authentication Failures
Published
Assigned by
VulnCheck (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-129134 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-129134?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-129134?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-129134 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-129134

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-129134](https://cve.bz/cve/badge/CVE-2026-129134.svg)](https://cve.bz/cve/CVE-2026-129134)

HTML:

<a href="https://cve.bz/cve/CVE-2026-129134"><img src="https://cve.bz/cve/badge/CVE-2026-129134.svg" alt="CVE-2026-129134"></a>

Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
meeting-room-booking-system mrbs-codebefore 1.13.0

Attack patterns (CAPEC)

  • CAPEC-50 Password Recovery Exploitation Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON