CVE-2007-1878: Cross-zone scripting vulnerability in the DOM templates (domplates) used by the console.log function in the Fi

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MEDIUM 6.8DOWNGRADE

CVE-2007-1878 is a medium-severity flaw (CVSS 6.8) affecting firebug. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-zone scripting vulnerability in the DOM templates (domplates) used by the console.log function in the Firebug extension before 1.03 for Mozilla Firefox allows remote attackers to bypass zone restrictions, read arbitrary file:// URIs, or execute arbitrary code in the browser chrome, as demonstrated via the runFile function, related to lack of HTML escaping in the property name.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	5.1% (top 8%)
CISA exploited list	No
Published	2007-04-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: parakey inc.

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-04-06 00:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

parakey inc. firebug DOWNGRADE

Affected: 1.01 · 1.02

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.01

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.01 (Debian / Ubuntu)

apt-cache madison firebug sudo apt install firebug=<VERSION_BEFORE_1.01> sudo apt-mark hold firebug

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

dnf --showduplicates list firebug sudo dnf downgrade firebug-<VERSION_BEFORE_1.01> sudo dnf versionlock add firebug

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-2007-1878?

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

Is CVE-2007-1878 being exploited?

CVE-2007-1878 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-2007-1878 affect?

CVE-2007-1878 affects firebug. Severity is medium (CVSS 6.8). Cross-zone scripting vulnerability in the DOM templates (domplates) used by the console.log function in the Firebug extension before 1.03 for Mozilla Firefox allows remote attackers to bypass zone restrictions, read arbitrary file:// URIs,

How urgent is CVE-2007-1878?

Priority 52/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Software pages

Google Chrome vulnerabilities · Mozilla Firefox vulnerabilities

Related CVEs

CVE-2007-1947 LOW 3.5 UPGRADE Cross-zone scripting vulnerability in the DOM templates (domplates) used by the console.log function in the Fi

References

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