CVE-2026-30578: File Thinghie 2.5.7 is vulnerable to Cross Site Scripting (XSS)

Routine

MEDIUM 6.5DOWNGRADE

CVE-2026-30578 is a medium-severity flaw (CVSS 6.5) affecting file thingie. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File Thinghie 2.5.7 is vulnerable to Cross Site Scripting (XSS). A malicious user can leverage the "dir" parameter of the GET request to invoke arbitrary javascript code.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: leefish

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

Am I affected?

Timeline

2026-03-20 18:16 UTCPublished CVE record published
2026-06-17 10:32 UTCUpdated Record last modified

leefish file thingie DOWNGRADE

Affected: 2.5.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5.7

1. Check installed version

apt-cache policy file-thingie || rpm -q file-thingie || file-thingie --version

2. No fixed release: DOWNGRADE to a release before 2.5.7 (Debian / Ubuntu)

apt-cache madison file-thingie sudo apt install file-thingie=<VERSION_BEFORE_2.5.7> sudo apt-mark hold file-thingie

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

dnf --showduplicates list file-thingie sudo dnf downgrade file-thingie-<VERSION_BEFORE_2.5.7> sudo dnf versionlock add file-thingie

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-2026-30578?

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

Is CVE-2026-30578 being exploited?

CVE-2026-30578 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-2026-30578 affect?

CVE-2026-30578 affects file thingie. Severity is medium (CVSS 6.5). File Thinghie 2.5.7 is vulnerable to Cross Site Scripting (XSS). A malicious user can leverage the "dir" parameter of the GET request to invoke arbitrary javascript code.

How urgent is CVE-2026-30578?

Priority 25/100. No elevated risk signals yet.

Related CVEs

CVE-2026-30580 MEDIUM 4.3 DOWNGRADE File Thingie 2.5.7 is vulnerable to Directory Traversal
CVE-2026-30579 MEDIUM 6.5 DOWNGRADE File Thingie 2.5.7 is vulnerable to Cross Site Scripting (XSS)
CVE-2023-53942 HIGH 8.8 DOWNGRADE File Thingie 2.5.7 contains an authenticated file upload vulnerability that allows remote attackers to upload

References

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