CVE-2024-33437: An issue in CSS Exfil Protection v.1.1.0 allows a remote attacker to obtain sensitive information due to missi

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HIGH 7.5REMOTEDOWNGRADE

CVE-2024-33437 is a high-severity flaw (CVSS 7.5) affecting css exfil protection. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in CSS Exfil Protection v.1.1.0 allows a remote attacker to obtain sensitive information due to missing support for CSS Style Rules.

Why this priority

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

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-200
Published	2024-04-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mikegualtieri

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

Am I affected?

Timeline

2024-04-30 20:15 UTCPublished CVE record published
2026-06-17 07:31 UTCUpdated Record last modified

mikegualtieri css exfil protection DOWNGRADE

Affected: 1.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

1. Check installed version

apt-cache policy css-exfil-protection || rpm -q css-exfil-protection || css-exfil-protection --version

2. No fixed release: DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison css-exfil-protection sudo apt install css-exfil-protection=<VERSION_BEFORE_1.1.0> sudo apt-mark hold css-exfil-protection

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

dnf --showduplicates list css-exfil-protection sudo dnf downgrade css-exfil-protection-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add css-exfil-protection

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-2024-33437?

css exfil protection: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-33437 being exploited?

CVE-2024-33437 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-2024-33437 affect?

CVE-2024-33437 affects css exfil protection. Severity is high (CVSS 7.5). An issue in CSS Exfil Protection v.1.1.0 allows a remote attacker to obtain sensitive information due to missing support for CSS Style Rules.

How urgent is CVE-2024-33437?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-33436 MEDIUM 5.3 DOWNGRADE An issue in CSS Exfil Protection v.1.1.0 allows a remote attacker to obtain sensitive information due to missi
CVE-2024-29384 HIGH 7.5 DOWNGRADE An issue in CSS Exfil Protection v.1.1.0 allows a remote attacker to obtain sensitive information via the cont

References

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