How severe is CVE-2007-6421?

CVE-2007-6421 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2007-6421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-6421?

CVE-2007-6421 primarily affects Apache Http Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-6421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-6421 published?

CVE-2007-6421 was published on 2008-01-08 and last updated on 2026-06-16.

CVE-2007-6421

CVE-2007-6421 is a low-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 3.5. 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-79.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apache Http Server
Published: 2008-01-08
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in balancer-manager in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6 allows remote attackers to inject arbitrary web script or HTML via the (1) ss, (2) wr, or (3) rr parameters, or (4) the URL.

Frequently asked questions

What is CVE-2007-6421?: Cross-site scripting (XSS) vulnerability in balancer-manager in mod_proxy_balancer in the Apache HTTP Server 2.2.0 through 2.2.6 allows remote attackers to inject arbitrary web script or HTML via the (1) ss, (2) wr, or (3) rr parameters, or (4) the URL.
How severe is CVE-2007-6421?: CVE-2007-6421 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2007-6421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-6421?: CVE-2007-6421 primarily affects Apache Http Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-6421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-6421 published?: CVE-2007-6421 was published on 2008-01-08 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:apache:http_server:-:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.2.6:*:*:*:*:*:*:*

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CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
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CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
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Threat intelligence

Threat-intel indicators referencing this CVE:

222.99.52.202 (ipv4-addr)
218.4.156.254 (ipv4-addr)
41.224.62.206 (ipv4-addr)
171.100.156.38 (ipv4-addr)