CVE-2025-51662: A stored cross-site scripting (XSS) vulnerability is found in the text sharing feature of FileCodeBox version

Q: How do I fix CVE-2025-51662?

filecodebox: upgrade to newer than 2.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-51662 being exploited?

CVE-2025-51662 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-2025-51662 affect?

CVE-2025-51662 affects filecodebox. Severity is medium (CVSS 5.4). A stored cross-site scripting (XSS) vulnerability is found in the text sharing feature of FileCodeBox version 2.2 and earlier. Insufficient input validation allows attackers to inject arbitrary JavaScript code into shared text "codeboxes".

Q: How urgent is CVE-2025-51662?

Priority 26/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2025-51662 is a medium-severity flaw (CVSS 5.4) affecting filecodebox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored cross-site scripting (XSS) vulnerability is found in the text sharing feature of FileCodeBox version 2.2 and earlier. Insufficient input validation allows attackers to inject arbitrary JavaScript code into shared text "codeboxes". The xss payload is automatically executed in the browsers of any users who try to access the infected codebox by clicking link or entering share code.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (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	2025-11-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lanol

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

Am I affected?

Timeline

2025-11-19 20:15 UTCPublished CVE record published
2026-06-17 09:35 UTCUpdated Record last modified

lanol filecodebox UPGRADE

Affected: <= 2.2

Fixed in: newer than 2.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade filecodebox

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-2025-51662?

filecodebox: upgrade to newer than 2.2. Exact commands for each OS are on this page.

Is CVE-2025-51662 being exploited?

CVE-2025-51662 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-2025-51662 affect?

CVE-2025-51662 affects filecodebox. Severity is medium (CVSS 5.4). A stored cross-site scripting (XSS) vulnerability is found in the text sharing feature of FileCodeBox version 2.2 and earlier. Insufficient input validation allows attackers to inject arbitrary JavaScript code into shared text "codeboxes".

How urgent is CVE-2025-51662?

Priority 26/100. Public exploit reference

Related CVEs

CVE-2025-51663 HIGH 7.5 UPGRADE A vulnerability found in IPRateLimit implementation of FileCodeBox up to 2.2 allows remote attackers to bypass
CVE-2025-51661 HIGH 7.5 UPGRADE A path Traversal vulnerability found in FileCodeBox v2.2 and earlier allows arbitrary file writes when applica
CVE-2024-34525 MEDIUM 5.3 DOWNGRADE FileCodeBox 2.0 stores a OneDrive password and AWS key in a cleartext env file.

References

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