CVE-2011-0420: php
Vulnerability summary
CVE-2011-0420 is a medium (CVSS 5.0) vulnerability in php. EPSS estimates a 14.41% chance of exploitation in the next 30 days, higher than 96.6% of scored vulnerabilities. 4 public exploits are recorded.
Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 18-02-2011PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
14.41%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
No change 0.00 pp
From 14.41% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
4 foundExploit Reference (securityfocus.com)
Maturity: unknown
Exploit Reference (securityreason.com)
Maturity: unknown
PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Php1 product
- phpEOL5.3.5
1 vendor · 1 product
References
12 links
Show all 12 references
- support.apple.com/kb/HT5002X Refsource CONFIRM