Published:2015/09/01  Last Updated:2015/09/01

Twit BBS vulnerable to cross-site scripting


Twit BBS provided by LEMON-S PHP contains a cross-site scripting vulnerability.

Products Affected

  • Twit BBS


Twit BBS provided by LEMON-S PHP contains a persistent cross-site scripting (CWE-79) vulnerability due to the processing of imagetitle parameter in index.php.


An arbitrary script may be executed on the user's web browser.


Do not use Twit BBS
Twit BBS is no longer being developed or maintained. It is recommended to stop using Twit BBS.

Vendor Status

Vendor Status Last Update Vendor Notes
LEMON-S PHP Vulnerable 2015/09/01


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2015.09.01 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) Specialized access conditions or extenuating circumstances do not exist.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is no impact to the confidentiality of the system.
Integrity Impact(I) None (N) Partial (P) Complete (C) Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.
Availability Impact(A) None (N) Partial (P) Complete (C) There is no impact to the availability of the system.

Base Score:5.0


Shoji Baba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2015-2989
JVN iPedia JVNDB-2015-000121