CVE-2025-2123: GeSHi CSS cssgen.php get_var cross site scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-09 · updated 2026-06-17
Weakness: CWE-79

Description

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.

Affected products

GeSHi: through 1.0.9.1

References

https://github.com/GeSHi/geshi-1.0/issues/159
https://github.com/GeSHi/geshi-1.0/issues/159#issue-2880408694
https://vuldb.com/?ctiid.299036
https://vuldb.com/?id.299036
https://vuldb.com/?submit.507418
https://github.com/GeSHi/geshi-1.0/issues/159
https://github.com/GeSHi/geshi-1.0/issues/159#issue-2880408694

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