CVE-2025-14556: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in D

Routine

MEDIUM 5.4UPGRADE

CVE-2025-14556 is a medium-severity flaw (CVSS 5.4) affecting flag. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Drupal Flag allows Cross-Site Scripting (XSS).This issue affects Flag: from 7.X-3.0 through 7.X-3.9.

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 89%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-14
Last modified	2026-06-17

Publisher (CNA): Drupal.org · Vendor: flag module project

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

Am I affected?

Timeline

2026-01-14 19:16 UTCPublished CVE record published
2026-06-17 08:36 UTCUpdated Record last modified

flag module project flag UPGRADE

Affected: >= 7.x-3.0 and <= 7.x-3.9

Fixed in: newer than 7.x-3.9

Safe to downgrade to: a release before 7.x-3.0

1. Check installed version

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

2. UPGRADE to newer than 7.x-3.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flag

Note

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

3. If no update is available yet, DOWNGRADE to a release before 7.x-3.0 (Debian / Ubuntu)

apt-cache madison flag sudo apt install flag=<VERSION_BEFORE_7.x-3.0> sudo apt-mark hold flag

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list flag sudo dnf downgrade flag-<VERSION_BEFORE_7.x-3.0> sudo dnf versionlock add flag

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-2025-14556?

flag: upgrade to newer than 7.x-3.9. Exact commands for each OS are on this page.

Is CVE-2025-14556 being exploited?

CVE-2025-14556 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-2025-14556 affect?

CVE-2025-14556 affects flag. Severity is medium (CVSS 5.4). Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Drupal Flag allows Cross-Site Scripting (XSS).This issue affects Flag: from 7.X-3.0 through 7.X-3.9.

How urgent is CVE-2025-14556?

Priority 27/100. Public exploit reference

Software pages

Drupal vulnerabilities

References

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