How severe is CVE-2010-4555?

CVE-2010-4555 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2010-4555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4555?

CVE-2010-4555 primarily affects Squirrelmail. In total, 91 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4555?

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

When was CVE-2010-4555 published?

CVE-2010-4555 was published on 2011-07-14 and last updated on 2026-06-16.

CVE-2010-4555

CVE-2010-4555 is a medium-severity vulnerability in Squirrelmail with a CVSS 2.0 base score of 4.3. 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: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Squirrelmail
Published: 2011-07-14
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in SquirrelMail 1.4.21 and earlier allow remote attackers to inject arbitrary web script or HTML via vectors involving (1) drop-down selection lists, (2) the > (greater than) character in the SquirrelSpell spellchecking plugin, and (3) errors associated with the Index Order (aka options_order) page.

Frequently asked questions

What is CVE-2010-4555?: Multiple cross-site scripting (XSS) vulnerabilities in SquirrelMail 1.4.21 and earlier allow remote attackers to inject arbitrary web script or HTML via vectors involving (1) drop-down selection lists, (2) the > (greater than) character in the SquirrelSpell spellchecking plugin, and (3) errors associated with the Index Order (aka options_order) page.
How severe is CVE-2010-4555?: CVE-2010-4555 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2010-4555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4555?: CVE-2010-4555 primarily affects Squirrelmail. In total, 91 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-4555 published?: CVE-2010-4555 was published on 2011-07-14 and last updated on 2026-06-16.

References

Affected products (91)

cpe:2.3:a:squirrelmail:squirrelmail:*:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.3:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.3.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.3pre1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.3pre2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.4:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.4pre1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.4pre2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.5:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.5pre1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:0.5pre2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0pre1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0pre2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.0pre3:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.0:rc3:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:squirrelmail:squirrelmail:1.2.6:rc1:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

171.100.156.38 (ipv4-addr)