How severe is CVE-2019-11830?

CVE-2019-11830 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-11830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11830?

CVE-2019-11830 affects Typo3 Pharstreamwrapper. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11830?

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

When was CVE-2019-11830 published?

CVE-2019-11830 was published on 2019-05-09 and last updated on 2026-06-17.

CVE-2019-11830

CVE-2019-11830 is a critical-severity vulnerability in Typo3 Pharstreamwrapper with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Typo3 Pharstreamwrapper
Published: 2019-05-09
Last modified: 2026-06-17

Description

PharMetaDataInterceptor in the PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 mishandles Phar stub parsing, which allows attackers to bypass a deserialization protection mechanism.

Frequently asked questions

What is CVE-2019-11830?: PharMetaDataInterceptor in the PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 mishandles Phar stub parsing, which allows attackers to bypass a deserialization protection mechanism.
How severe is CVE-2019-11830?: CVE-2019-11830 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-11830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11830?: CVE-2019-11830 affects Typo3 Pharstreamwrapper. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11830?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-11830 published?: CVE-2019-11830 was published on 2019-05-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:typo3:pharstreamwrapper:*:*:*:*:*:*:*:*

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