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CVE-2015-5523

15
FAUCET Score

CVE-2015-5523 describes a denial-of-service vulnerability in Tidy before version 4.9.31, affecting products from Apple, Canonical, Debian, and HTACG. This flaw allows remote attackers to crash the application by sending specially crafted input with multiple whitespace characters before an empty href, leading to a large memory allocation. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial availability impact, but no impact on confidentiality or integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
15.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

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
3.84%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0384 is in the 85th percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

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 Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: tidy

Vendor Advisories (1)

redhatCVE-2015-5523Moderate

tidy: heap buffer overflow in ParseValue()

Jun 3, 2015

References

lists.apple.com / archives/security-announce/2015/Sep/msg00001.html
Mailing ListThird Party Advisory
lists.apple.com / archives/security-announce/2015/Sep/msg00005.html
Mailing ListThird Party Advisory
lists.apple.com / archives/security-announce/2015/Sep/msg00008.html
Mailing ListThird Party Advisory
github.com / htacg/tidy-html5/issues/217
Exploit
support.apple.com / HT205212
Third Party Advisory
support.apple.com / HT205213
Third Party Advisory
support.apple.com / HT205267
Third Party Advisory
debian.org / security/2015/dsa-3309
Third Party Advisory
openwall.com / lists/oss-security/2015/06/04/2
Exploit
openwall.com / lists/oss-security/2015/07/13/7
Exploit
openwall.com / lists/oss-security/2015/07/15/3
securityfocus.com / bid/75037
securitytracker.com / id/1033703
ubuntu.com / usn/USN-2695-1
Third Party Advisory