CVE-2025-63950: An insecure deserialization vulnerability exists in the download.php script of the to3k Twittodon application

Q: How do I fix CVE-2025-63950?

twittodon: upgrade to newer than 2023-02-28. Exact commands for each OS are on this page.

Q: Is CVE-2025-63950 being exploited?

CVE-2025-63950 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-2025-63950 affect?

CVE-2025-63950 affects twittodon. Severity is high (CVSS 7.5). An insecure deserialization vulnerability exists in the download.php script of the to3k Twittodon application through commit b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28). The 'obj' parameter receives base64-encoded data that is pas

Q: How urgent is CVE-2025-63950?

Priority 47/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2025-63950 is a high-severity flaw (CVSS 7.5) affecting twittodon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An insecure deserialization vulnerability exists in the download.php script of the to3k Twittodon application through commit b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28). The 'obj' parameter receives base64-encoded data that is passed directly to the unserialize() function without validation. This allows a remote, unauthenticated attacker to inject arbitrary PHP objects, leading to a denial of service.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-502
Published	2025-12-18
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: tomaszdunia

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-18 21:15 UTCPublished CVE record published
2026-10-13 11:10 UTCUpdated Record last modified

tomaszdunia twittodon UPGRADE

Affected: <= 2023-02-28

Fixed in: newer than 2023-02-28

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy twittodon || rpm -q twittodon || twittodon --version

2. UPGRADE to newer than 2023-02-28 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade twittodon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade twittodon

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-63950?

twittodon: upgrade to newer than 2023-02-28. Exact commands for each OS are on this page.

Is CVE-2025-63950 being exploited?

CVE-2025-63950 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-2025-63950 affect?

CVE-2025-63950 affects twittodon. Severity is high (CVSS 7.5). An insecure deserialization vulnerability exists in the download.php script of the to3k Twittodon application through commit b1c58a7d1dc664b38deb486ca290779621342c0b (2023-02-28). The 'obj' parameter receives base64-encoded data that is pas

How urgent is CVE-2025-63950?

Priority 47/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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