CVE-2005-1193
HighSummary
Vulnerability in phpBB before version 2.0.15 allows remote attackers to execute arbitrary script by injecting malicious code into BBcode tags. The bbencode_second_pass and make_clickable functions in bbcode.php do not properly filter URI schemes such as javascript:, applet:, about:, activex:, chrome:, or script:.
Risk Assessment
An attacker can exploit this flaw to execute arbitrary JavaScript in the victim's browser, potentially leading to session theft, account takeover, or malware distribution.
Recommendation
Immediately upgrade phpBB to version 2.0.15 or later, which includes fixes for filtering dangerous URI schemes in BBcode tags.
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Original NVD description (English source)
The bbencode_second_pass and make_clickable functions in bbcode.php for phpBB before 2.0.15, as used in viewtopic.php, privmsg.php, and other scripts, allow remote attackers to execute arbitrary script via a BBcode tag with a (1) javascript:, (2) applet:, (3) about:, (4) activex:, (5) chrome:, or (6) script: URI scheme, as demonstrated using the URL tag.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

