Is CVE-2008-4721 being actively exploited?

CVE-2008-4721 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-4721?

CVE-2008-4721 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2008-4721

HIGH · CVSS 7.5EPSS 2.8%EU EUVD

PHP Jabbers Post Comment 3.0 allows remote attackers to bypass authentication and gain administrative access by setting the PostCommentsAdmin cookie to "logged."

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-200
EPSS score: 2.8% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-4701)
Published: October 23, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-4701 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

php jabbers / post comment

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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