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CVE-2009-3627

17
FAUCET Score

CVE-2009-3627 is a denial-of-service vulnerability affecting HTML-Parser versions prior to 3.63, specifically in its decode_entities function. An attacker can trigger an infinite loop by providing an incomplete SGML numeric character reference, leading to an invalid UTF-8 character. This vulnerability has a CVSS score of 4.3 (medium severity), indicating a network-based attack with medium complexity and potential for partial availability impact. There is no evidence of active exploitation, nor are there publicly available exploit tools or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.54CPE matchmatch criteria
cpe:2.3:a:derrick_oswald:html-parser:*:*:*:*:*:*:*:*
1.00CPE matchmatch criteria
cpe:2.3:a:derrick_oswald:html-parser:1.00:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:derrick_oswald:html-parser:1.1:*:*:*:*:*:*:*
1.2CPE matchmatch criteria
cpe:2.3:a:derrick_oswald:html-parser:1.2:*:*:*:*:*:*:*
1.3CPE matchmatch criteria
cpe:2.3:a:derrick_oswald:html-parser:1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 53rd percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2009-3627

perl-HTML-Parser: Production of invalid (wide) character(s) while parsing HTML entity(ies) with invalid UTF-8 character(s)

Oct 22, 2009

References

github.com / gisle/html-parser/commit/b9aae1e43eb2c8e989510187cff0ba3e996f9a4c
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/37155
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/53941
issues.apache.org / SpamAssassin/show_bug.cgi
Patch
openwall.com / lists/oss-security/2009/10/23/9
Patch
securityfocus.com / bid/36807
Patch
vupen.com / english/advisories/2009/3022
PatchVendor Advisory