Vulnerability in Opera Browser

CVE-2005-3750

Opera before 8.51 on Linux and Unix systems allows remote attackers to execute arbitrary code via shell metacharacters (backticks) in a URL that another product provides in a command line argument when launching Opera.

Published 2005-11-22 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.064 (93.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000

Affected products

Opera Browser

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

www.opera.com/docs/changelogs/linux/851/ (Broken Link)
www.novell.com/linux/security/advisories/2005_28_sr.html (vendor-advisory, Third Party Advisory)
secunia.com/advisories/18111 (Broken Link, third-party-advisory)
securityreason.com/securityalert/199 (Third Party Advisory, third-party-advisory)
www.vupen.com/english/advisories/2005/2519 (vdb-entry, Broken Link)
www.osvdb.org/21003 (Patch, vdb-entry, Broken Link)
securitytracker.com/id (Patch, VDB Entry, Third Party Advisory, vdb-entry, Broken Link, Vendor Advisory)
www.securityfocus.com/bid/15521 (Patch, VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.securityfocus.com/archive/1/417393/30/0/threaded (mailing-list, VDB Entry, Third Party Advisory, Broken Link)
secunia.com/secunia_research/2005-57/advisory/ (Patch, Broken Link)