CVE-2025-27453: The HttpOnly flag is set to false on the PHPSESSION cookie

Q: How do I fix CVE-2025-27453?

meac300-fnade4 firmware: upgrade to newer than 0.16.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-27453 being exploited?

CVE-2025-27453 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-27453 affect?

CVE-2025-27453 affects meac300-fnade4 firmware. Severity is medium (CVSS 5.3). The HttpOnly flag is set to false on the PHPSESSION cookie. Therefore, the cookie can be accessed by other sources such as JavaScript.

Q: How urgent is CVE-2025-27453?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 5.3UPGRADE

CVE-2025-27453 is a medium-severity flaw (CVSS 5.3) affecting meac300-fnade4 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The HttpOnly flag is set to false on the PHPSESSION cookie. Therefore, the cookie can be accessed by other sources such as JavaScript.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-1004
Published	2025-07-03
Last modified	2026-06-17

Publisher (CNA): SICK AG · Vendor: endress

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

Am I affected?

Timeline

2025-07-03 12:15 UTCPublished CVE record published
2026-06-17 09:03 UTCUpdated Record last modified

endress meac300-fnade4 firmware UPGRADE

Affected: <= 0.16.0

Fixed in: newer than 0.16.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2025-27453?

meac300-fnade4 firmware: upgrade to newer than 0.16.0. Exact commands for each OS are on this page.

Is CVE-2025-27453 being exploited?

CVE-2025-27453 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-2025-27453 affect?

CVE-2025-27453 affects meac300-fnade4 firmware. Severity is medium (CVSS 5.3). The HttpOnly flag is set to false on the PHPSESSION cookie. Therefore, the cookie can be accessed by other sources such as JavaScript.

How urgent is CVE-2025-27453?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2025-27461 HIGH 7.6 MITIGATE During startup, the device automatically logs in the EPC2 Windows user without requesting a password.
CVE-2025-27460 HIGH 7.6 MITIGATE The hard drives of the device are not encrypted using a full volume encryption feature such as BitLocker
CVE-2025-27459 MEDIUM 4.4 MITIGATE The VNC application stores its passwords encrypted within the registry but uses DES for encryption
CVE-2025-27458 MEDIUM 6.5 MITIGATE The VNC authentication mechanism bases on a challenge-response system where both server and client use the sam
CVE-2025-27457 MEDIUM 6.5 MITIGATE All communication between the VNC server and client(s) is unencrypted

References

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