How severe is CVE-2008-4721?

CVE-2008-4721 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-4721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4721?

CVE-2008-4721 affects Php Jabbers Post Comment. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2008-4721 published?

CVE-2008-4721 was published on 2008-10-23 and last updated on 2026-06-16.

CVE-2008-4721

CVE-2008-4721 is a high-severity vulnerability in Php Jabbers Post Comment with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Php Jabbers Post Comment
Published: 2008-10-23
Last modified: 2026-06-16

Description

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

Frequently asked questions

What is CVE-2008-4721?: PHP Jabbers Post Comment 3.0 allows remote attackers to bypass authentication and gain administrative access by setting the PostCommentsAdmin cookie to "logged."
How severe is CVE-2008-4721?: CVE-2008-4721 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-4721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4721?: CVE-2008-4721 affects Php Jabbers Post Comment. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-4721 published?: CVE-2008-4721 was published on 2008-10-23 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:php_jabbers:post_comment:2.0:*:*:*:*:*:*:*

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