CVE-2026-45307Public exploitNetwork attack vector

Open redirect via post-login parser mismatch

Published May 28, 2026 · Updated May 28, 2026

Open redirect in Speakr before 0.8.20-alpha allows remote attackers to send authenticated users to external sites after login. The is_safe_url() helper validates a urljoin-normalized next parameter, but the controller passes the raw value to redirect(), so ////evil.com passes the same-host check and becomes an external Location header. Exploitation requires a user to follow a crafted Speakr login URL and sign in, enabling phishing from a trusted deployment without altering Speakr data or availability.

CVSS severity6.1
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Speakr before 0.8.20-alpha allows remote attackers to send authenticated users to external sites after login. The is_safe_url() helper validates a urljoin-normalized next parameter, but the controller passes the raw value to redirect(), so ////evil.com passes the same-host check and becomes an external Location header. Exploitation requires a user to follow a crafted Speakr login URL and sign in, enabling phishing from a trusted deployment without altering Speakr data or availability.

The record

CVE
CVE-2026-45307
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Murtaza Nasir
Product
Speakr
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.8.20-alpha

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Murtaza Nasir · Speakrversion=< 0.8.20-alpha

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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