CVE-2017-5677

CVE-2017-5677 is a critical-severity vulnerability in Pear Html Ajax 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.

Key facts

Description

PEAR HTML_AJAX 0.3.0 through 0.5.7 has a PHP Object Injection Vulnerability in the PHP Serializer. It allows remote code execution. In one viewpoint, the root cause is an incorrect regular expression.

Frequently asked questions

What is CVE-2017-5677?
PEAR HTML_AJAX 0.3.0 through 0.5.7 has a PHP Object Injection Vulnerability in the PHP Serializer. It allows remote code execution. In one viewpoint, the root cause is an incorrect regular expression.
How severe is CVE-2017-5677?
CVE-2017-5677 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-2017-5677 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-5677?
CVE-2017-5677 primarily affects Pear Html Ajax. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-5677?
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-2017-5677 published?
CVE-2017-5677 was published on 2017-02-06 and last updated on 2026-06-17.

References

Affected products (15)