CVE-2011-4558

HIGHNVD 7.27.2—Elevated

7.2

Tiki 8.2 and earlier allows remote administrators to execute arbitrary PHP code via crafted input to the regexres and regex parameters.

CVSS v3: 7.2
EG Score: 7.2(medium)
EPSS: 87.3%
KEV: Not listed

Published

January 27, 2020

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://packetstormsecurity.com/files/108111/Tiki-Wiki-CMS-Groupware-8.2-Code-Injection.html
af854a3a-2127-422b-91ae-364da2661108https://packetstormsecurity.com/files/108111/Tiki-Wiki-CMS-Groupware-8.2-Code-Injection.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
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2026-05-27 08:38 UTCEG score recompute
2026-05-27 08:38 UTCGHSA enrichment
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-18265
First seen Dec 22, 2011
Tiki Wiki CMS Groupware 8.2 - 'snarf_ajax.php' Remote PHP Code Injection
Open source ↗

Frequently asked(5)

What is CVE-2011-4558?

CVE-2011-4558 is a high vulnerability published on January 27, 2020. Tiki 8.2 and earlier allows remote administrators to execute arbitrary PHP code via crafted input to the regexres and regex parameters.

When was CVE-2011-4558 disclosed?

CVE-2011-4558 was first published in the National Vulnerability Database on January 27, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-4558 actively exploited?

CVE-2011-4558 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2011-4558?

CVE-2011-4558 has a CVSS v3 base score of 7.2 (NVD).

How do I remediate CVE-2011-4558?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4558, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2011-4558

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2011-4558?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)