CVE-2018-1000525: openpsa contains a PHP Object Injection vulnerability in Form data passed as GET request variables that can re

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CRITICAL 9.8REMOTEMITIGATE

CVE-2018-1000525 is a critical-severity flaw (CVSS 9.8) affecting openpsa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

openpsa contains a PHP Object Injection vulnerability in Form data passed as GET request variables that can result in Possible information disclosure and remote code execution. This attack appear to be exploitable via Specially crafted GET request variable containing serialised PHP object. This vulnerability appears to have been fixed in after commit 097eae0.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-502
Published	2018-06-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openpsa2

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-06-26 16:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

openpsa2 openpsa MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openpsa || rpm -q openpsa || openpsa --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-1000525?

openpsa: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-1000525 being exploited?

CVE-2018-1000525 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-1000525 affect?

CVE-2018-1000525 affects openpsa. Severity is critical (CVSS 9.8). openpsa contains a PHP Object Injection vulnerability in Form data passed as GET request variables that can result in Possible information disclosure and remote code execution. This attack appear to be exploitable via Specially crafted GET

How urgent is CVE-2018-1000525?

Priority 67/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-1000526 HIGH 7.5 MITIGATE Openpsa contains a XML Injection vulnerability in RSS file upload feature that can result in Remote denial of

References

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