CVE-2025-2123: A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1

Q: How do I fix CVE-2025-2123?

geshi: upgrade to newer than 1.0.9.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-2123 being exploited?

CVE-2025-2123 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-2025-2123 affect?

CVE-2025-2123 affects geshi. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument defau

Q: How urgent is CVE-2025-2123?

Priority 27/100. Public exploit reference

Routine

LOW 3.5UPGRADE

CVE-2025-2123 is a low-severity flaw (CVSS 3.5) affecting geshi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument default-styles/keywords-1/keywords-2/keywords-3/keywords-4/comments leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-79, CWE-94
Published	2025-03-09
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: qbnz

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

Am I affected?

Timeline

2025-03-09 15:15 UTCPublished CVE record published
2026-06-17 09:06 UTCUpdated Record last modified

qbnz geshi UPGRADE

Affected: <= 1.0.9.1

Fixed in: newer than 1.0.9.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.9.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade geshi

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-2025-2123?

geshi: upgrade to newer than 1.0.9.1. Exact commands for each OS are on this page.

Is CVE-2025-2123 being exploited?

CVE-2025-2123 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-2025-2123 affect?

CVE-2025-2123 affects geshi. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in GeSHi up to 1.0.9.1. Affected by this issue is the function get_var of the file /contrib/cssgen.php of the component CSS Handler. The manipulation of the argument defau

How urgent is CVE-2025-2123?

Priority 27/100. Public exploit reference

Software pages

PHP vulnerabilities

References

← Back to latest CVEs