XSS in Drupal

CVE-2008-1133

The Drupal.checkPlain function in Drupal 6.0 only escapes the first instance of a character in ECMAScript, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2008-03-04 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.023 (83.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Drupal — versions 6.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

drupal.org/node/227608 (Patch, Vendor Advisory)
secunia.com/advisories/29118 (Third Party Advisory, third-party-advisory)
www.securityfocus.com/bid/28026 (Patch, VDB Entry, Third Party Advisory, vdb-entry)