CVE-2025-69602: A session fixation vulnerability exists in 66biolinks v62.0.0 by AltumCode, where the application does not reg

This week

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2025-69602 is a critical-severity flaw (CVSS 9.1) affecting 66biolinks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A session fixation vulnerability exists in 66biolinks v62.0.0 by AltumCode, where the application does not regenerate the session identifier after successful authentication. As a result, the same session cookie value is reused for users logging in from the same browser, allowing an attacker who can set or predict a session ID to potentially hijack an authenticated session.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-384
Published	2026-01-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: altumcode

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-28 19:16 UTCPublished CVE record published
2026-06-17 10:00 UTCUpdated Record last modified

altumcode 66biolinks DOWNGRADE

Affected: 62.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 62.0.0

1. Check installed version

apt-cache policy 66biolinks || rpm -q 66biolinks || 66biolinks --version

2. No fixed release: DOWNGRADE to a release before 62.0.0 (Debian / Ubuntu)

apt-cache madison 66biolinks sudo apt install 66biolinks=<VERSION_BEFORE_62.0.0> sudo apt-mark hold 66biolinks

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 66biolinks sudo dnf downgrade 66biolinks-<VERSION_BEFORE_62.0.0> sudo dnf versionlock add 66biolinks

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-69602?

66biolinks: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-69602 being exploited?

CVE-2025-69602 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-69602 affect?

CVE-2025-69602 affects 66biolinks. Severity is critical (CVSS 9.1). A session fixation vulnerability exists in 66biolinks v62.0.0 by AltumCode, where the application does not regenerate the session identifier after successful authentication. As a result, the same session cookie value is reused for users log

How urgent is CVE-2025-69602?

Priority 50/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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CVE-2025-66939 MEDIUM 5.4 DOWNGRADE Cross Site Scripting vulnerability in 66biolinks by AltumCode v.61.0.1 allows an attacker to execute arbitrary

References

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