PatchTheCVECVE-2023-23599: When copying a network request from the developer tools panel as a curl command the output was not being prope
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Routine
MEDIUM 6.5UPGRADEUPGRADEUPGRADE
CVE-2023-23599 is a medium-severity flaw (CVSS 6.5) affecting firefox, firefox esr, thunderbird. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
When copying a network request from the developer tools panel as a curl command the output was not being properly sanitized and could allow arbitrary commands to be hidden within. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 52%) |
| CISA exploited list | No |
| Weakness | CWE-116 |
| Published | 2023-06-02 |
| Last modified | 2026-10-24 |
Publisher (CNA): Mozilla Corporation · Vendor: mozilla
Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
mozilla firefox UPGRADE
Affected: < 109.0
Fixed in: 109.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy firefox || rpm -q firefox || firefox --version
2. UPGRADE to 109.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade firefox
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade firefox
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
mozilla firefox esr UPGRADE
Affected: < 102.7
Fixed in: 102.7
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy firefox-esr || rpm -q firefox-esr || firefox-esr --version
2. UPGRADE to 102.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade firefox-esr
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade firefox-esr
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
mozilla thunderbird UPGRADE
Affected: < 102.7
Fixed in: 102.7
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy thunderbird || rpm -q thunderbird || thunderbird --version
2. UPGRADE to 102.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade thunderbird
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade thunderbird
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Exact fixes by distribution
Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2
Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source
sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0
Ubuntu 22.04 · firefox · NOT AFFECTED
Ubuntu 20.04 · firefox · FIXED · 109.0+build2-0ubuntu0.20.04.1
sudo apt update && sudo apt install --only-upgrade firefox
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' firefox)" ge "109.0+build2-0ubuntu0.20.04.1" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 24.04 · firefox · NOT AFFECTED
Ubuntu 20.04 · thunderbird · FIXED · 1:102.7.1+build2-0ubuntu0.20.04.1
sudo apt update && sudo apt install --only-upgrade thunderbird
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' thunderbird)" ge "1:102.7.1+build2-0ubuntu0.20.04.1" && echo PATCHED || echo STILL-VULNERABLE
Ubuntu 22.04 · thunderbird · FIXED · 1:102.7.1+build2-0ubuntu0.22.04.1
sudo apt update && sudo apt install --only-upgrade thunderbird
dpkg --compare-versions "$(dpkg-query -W -f='${Version}' thunderbird)" ge "1:102.7.1+build2-0ubuntu0.22.04.1" && echo PATCHED || echo STILL-VULNERABLE
Debian 12 · firefox-esr · NOT AFFECTED
Debian 13 · firefox-esr · NOT AFFECTED
Debian 12 · thunderbird · NOT AFFECTED
Debian 13 · thunderbird · NOT AFFECTED
RHEL 7 · firefox · FIXED · firefox-102.7.0-1.el7_9
sudo dnf upgrade --advisory=RHSA-2023:0296
rpm -q firefox
RHEL 7 · thunderbird · FIXED · thunderbird-102.7.1-1.el7_9
sudo dnf upgrade --advisory=RHSA-2023:0456
rpm -q thunderbird
RHEL 8 · firefox · FIXED · firefox-102.7.0-1.el8_7
sudo dnf upgrade --advisory=RHSA-2023:0288
rpm -q firefox
RHEL 8 · thunderbird · FIXED · thunderbird-102.7.1-1.el8_7
sudo dnf upgrade --advisory=RHSA-2023:0463
rpm -q thunderbird
RHEL 8.1 Update Services for SAP Solutions · firefox · FIXED · firefox-102.7.0-1.el8_1
sudo dnf upgrade --advisory=RHSA-2023:0290
rpm -q firefox
Alpine 3.20 · firefox-esr · FIXED · firefox-esr-102.7.0-r0
apk add --upgrade firefox-esr
apk info -v firefox-esr
Alpine 3.21 · firefox-esr · FIXED · firefox-esr-102.7.0-r0
apk add --upgrade firefox-esr
apk info -v firefox-esr
Alpine 3.22 · firefox-esr · FIXED · firefox-esr-102.7.0-r0
apk add --upgrade firefox-esr
apk info -v firefox-esr
Alpine 3.23 · firefox-esr · FIXED · firefox-esr-102.7.0-r0
apk add --upgrade firefox-esr
apk info -v firefox-esr
sudo yum update --advisory=ALAS2-2023-1951
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
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.
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-2023-23599?
firefox: upgrade to 109.0; firefox esr: upgrade to 102.7; thunderbird: upgrade to 102.7. Exact commands for each OS are on this page.
Is CVE-2023-23599 being exploited?
CVE-2023-23599 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-2023-23599 affect?
CVE-2023-23599 affects firefox, firefox esr, thunderbird. Severity is medium (CVSS 6.5). When copying a network request from the developer tools panel as a curl command the output was not being properly sanitized and could allow arbitrary commands to be hidden within. This vulnerability affects Firefox < 109, Firefox ESR < 102.
How urgent is CVE-2023-23599?
Priority 35/100. No elevated risk signals yet.
Software pages
Mozilla Firefox vulnerabilities · curl vulnerabilities
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