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Fencer Intel
medium 4.3

CVE-2011-4273 json

Multiple cross-site scripting (XSS) vulnerabilities in GoAhead Webserver 2.18 allow remote attackers to inject arbitrary web script or HTML…

published 2011-11-03 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4215

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.8%
EPSS 4.8% chance of exploitation in 30 days, percentile 91%
public exploits
3
Exploit-DB

Summary

Multiple cross-site scripting (XSS) vulnerabilities in GoAhead Webserver 2.18 allow remote attackers to inject arbitrary web script or HTML via (1) the group parameter to goform/AddGroup, related to addgroup.asp; (2) the url parameter to goform/AddAccessLimit, related to addlimit.asp; or the (3) user (aka User ID) or (4) group parameter to goform/AddUser, related to adduser.asp.

Timeline

  1. First public exploit (EDB-36219)
  2. Published

Exploit prediction

4.77% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-36219 GoAhead Web Server 2.18 - 'adduser.asp' Multiple Cross-Site Scripting Vulnerabilities remote, 2011-10-10
  • EDB-36218 GoAhead Web Server 2.18 - 'addlimit.asp?url' Cross-Site Scripting remote, 2011-10-10
  • EDB-36217 GoAhead Web Server 2.18 - 'addgroup.asp?group' Cross-Site Scripting remote, 2011-10-10
  • kb.cert.org http://www.kb.cert.org/vuls/id/384427 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.