xslt.c in XML Security Library (aka xmlsec) before 1.2.17, as used in WebKit and other products, when XSLT is enabled, allows remote attacke
xslt.c in XML Security Library (aka xmlsec) before 1.2.17, as used in WebKit and other products, when XSLT is enabled, allows remote attackers to create or overwrite arbitrary files via vectors involving the libxslt output extension and a ds:Transform element during signature verification.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Apr 4, 2011
- Updated
- Jun 16, 2026
- EPSS
- 8.1% · 95th percentile
- CWE
- CWE-264
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 8.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| aleksey | xml security library | cpe:2.3:a:aleksey:xml_security_library |
| apple | webkit | cpe:2.3:a:apple:webkit |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- aleksey xml security libraryup to 1.2.16 inclusive
- aleksey xml security library0.0.1
- aleksey xml security library0.0.10
- aleksey xml security library0.0.11
- aleksey xml security library0.0.12
- aleksey xml security library0.0.13
- aleksey xml security library0.0.14
- aleksey xml security library0.0.15
- aleksey xml security library0.0.2
- aleksey xml security library0.0.2a
- aleksey xml security library0.0.3
- aleksey xml security library0.0.4
- aleksey xml security library0.0.5
- aleksey xml security library0.0.6
- aleksey xml security library0.0.7
- aleksey xml security library0.0.8
- aleksey xml security library0.0.9
- aleksey xml security library0.1.0
- aleksey xml security library0.1.1
- aleksey xml security library1.0.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | xmlsec1 | before 1.2.14-1.1 | 1.2.14-1.1 |
| Debian:5.0 | xmlsec1 | before 1.2.9-5+lenny1 | 1.2.9-5+lenny1 |
| Debian:6.0 | xmlsec1 | before 1.2.14-1+squeeze1 | 1.2.14-1+squeeze1 |
| Red Hat:enterprise_linux:4::as | xmlsec1 | before 0:1.2.6-3.2 | 0:1.2.6-3.2 |
| Red Hat:enterprise_linux:4::as | xmlsec1-debuginfo | before 0:1.2.6-3.2 | 0:1.2.6-3.2 |
| Red Hat:enterprise_linux:4::as | xmlsec1-devel | before 0:1.2.6-3.2 | 0:1.2.6-3.2 |
| Red Hat:enterprise_linux:4::as | xmlsec1-openssl | before 0:1.2.6-3.2 | 0:1.2.6-3.2 |
| Red Hat:enterprise_linux:4::as | xmlsec1-openssl-devel | before 0:1.2.6-3.2 | 0:1.2.6-3.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1 | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-debuginfo | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-devel | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-gnutls | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-gnutls-devel | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-nss | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-nss-devel | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-openssl | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
| Red Hat:enterprise_linux:5::server | xmlsec1-openssl-devel | before 0:1.2.9-8.1.2 | 0:1.2.9-8.1.2 |
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:xmlsec1 | 1.2.14-1.1 · Debian:12 | Package registry (OSV) |
| red hat:xmlsec1 | 0:1.2.6-3.2 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:xmlsec1-debuginfo | 0:1.2.6-3.2 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:xmlsec1-devel | 0:1.2.6-3.2 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:xmlsec1-gnutls | 0:1.2.9-8.1.2 · Red Hat:enterprise_linux:5::server | Package registry (OSV) |
| red hat:xmlsec1-gnutls-devel | 0:1.2.9-8.1.2 · Red Hat:enterprise_linux:5::server | Package registry (OSV) |
| red hat:xmlsec1-nss | 0:1.2.9-8.1.2 · Red Hat:enterprise_linux:5::server | Package registry (OSV) |
| red hat:xmlsec1-nss-devel | 0:1.2.9-8.1.2 · Red Hat:enterprise_linux:5::server | Package registry (OSV) |
| red hat:xmlsec1-openssl | 0:1.2.6-3.2 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:xmlsec1-openssl-devel | 0:1.2.6-3.2 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2011-10-18 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+197 d
- TodaySep 30, 2026+5659 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- High
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-264 · Permissions, Privileges, and Access ControlsCVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.gnome.org/browse/xmlsec/commit/?id=2d5eddcc4163ea050cf3a3a1a25452bb5124f780
- git.gnome.org/browse/xmlsec/commit/?id=35eaacde6093d6711339754fc2146341b8b9f5fa
- secunia.com/advisories/43920
- secunia.com/advisories/44167
- secunia.com/advisories/44423
- trac.webkit.org/changeset/79159
- www.aleksey.com/pipermail/xmlsec/2011/009120.html
- www.debian.org/security/2011/dsa-2219
- www.mandriva.com/security/advisories?name=MDVSA-2011:063
- www.redhat.com/support/errata/RHSA-2011-0486.html
- www.securityfocus.com/bid/47135
- www.securitytracker.com/id?1025284
- www.vupen.com/english/advisories/2011/0855
- www.vupen.com/english/advisories/2011/0858
- www.vupen.com/english/advisories/2011/1010
- www.vupen.com/english/advisories/2011/1172
- bugs.webkit.org/show_bug.cgi?id=52688
- bugzilla.redhat.com/show_bug.cgi?id=692133
- exchange.xforce.ibmcloud.com/vulnerabilities/66506
Vendor advisories and official records. Exploit/PoC links are deliberately left out.