Is CVE-2011-1153 in the CISA KEV catalog?

No. CVE-2011-1153 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1153?

CVE-2011-1153 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2011-1153?

CVE-2011-1153 has an EPSS score of 6.83% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2011-1153?

No published fix for CVE-2011-1153 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2011-1153

HIGHEPSS 93th pctl

7.5

CVSS v2

NVD

Description

Multiple format string vulnerabilities in phar_object.c in the phar extension in PHP 5.3.5 and earlier allow context-dependent attackers to obtain sensitive information from process memory, cause a denial of service (memory corruption), or possibly execute arbitrary code via format string specifiers in an argument to a class method, leading to an incorrect zend_throw_exception_ex call.

CWE-134

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

6.83%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.