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Fencer Intel
medium 4.3

CVE-2009-4837 json

Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allow remote attackers to i…

published 16y ago modified 4mo ago also EUVD-2009-4800

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) sig[1] parameter to base/base_qry_main.php, or the time[0][1] parameter to (2) base/base_stat_alerts.php or (3) base/base_stat_uaddr.php. NOTE: some of these details are obtained from third party information.

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Exploit prediction

1.10% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • spl0it.org http://spl0it.org/files/BASE-XSS/Reflective-notes.txt 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.