XMLRPC-C Library versions 1.07 through 1.67.01 are vulnerable to a reflected cross-site scripting (XSS) vulnerability in the error page comp
XMLRPC-C Library versions 1.07 through 1.67.01 are vulnerable to a reflected cross-site scripting (XSS) vulnerability in the error page component.
- Published
- Jul 26, 2026
- Updated
- Jul 27, 2026
- EPSS
- 0.3% · 19th percentile
- CWE
- CWE-79
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · TML
- 8.2
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (TML). Independent of NVD's CPE analysis and usually ahead of it.
XMLRPC-C XMLRPC-C
- 1.07 and later · up to and including 1.67.01affected · Advanced
- 1.07 and later · up to and including 1.64.03affected · Super stable
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | xmlrpc-c | before 1.51.0-11.el8_10.1 | 1.51.0-11.el8_10.1 |
| AlmaLinux:8 | xmlrpc-c-c++ | before 1.51.0-11.el8_10.1 | 1.51.0-11.el8_10.1 |
| AlmaLinux:8 | xmlrpc-c-client | before 1.51.0-11.el8_10.1 | 1.51.0-11.el8_10.1 |
| AlmaLinux:8 | xmlrpc-c-client++ | before 1.51.0-11.el8_10.1 | 1.51.0-11.el8_10.1 |
| AlmaLinux:8 | xmlrpc-c-devel | before 1.51.0-11.el8_10.1 | 1.51.0-11.el8_10.1 |
| AlmaLinux:9 | xmlrpc-c | before 1.51.0-17.el9_8 | 1.51.0-17.el9_8 |
| AlmaLinux:9 | xmlrpc-c-c++ | before 1.51.0-17.el9_8 | 1.51.0-17.el9_8 |
| AlmaLinux:9 | xmlrpc-c-client | before 1.51.0-17.el9_8 | 1.51.0-17.el9_8 |
| AlmaLinux:9 | xmlrpc-c-client++ | before 1.51.0-17.el9_8 | 1.51.0-17.el9_8 |
| AlmaLinux:9 | xmlrpc-c-devel | before 1.51.0-17.el9_8 | 1.51.0-17.el9_8 |
| Debian:12 | xmlrpc-c | all versions | — |
| openSUSE:Leap 16.0 | xmlrpc-c | before 1.54.06-160000.3.1 | 1.54.06-160000.3.1 |
| openSUSE:Tumbleweed | xmlrpc-c | before 1.64.03-2.1 | 1.64.03-2.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-apps-debuginfo | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-c++-debuginfo | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-client | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-client-debuginfo | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-client++-debuginfo | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-debuginfo | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::baseos | xmlrpc-c-debugsource | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::crb | xmlrpc-c-c++ | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::crb | xmlrpc-c-client++ | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
| Red Hat:enterprise_linux:8::crb | xmlrpc-c-devel | before 0:1.51.0-11.el8_10.1 | 0:1.51.0-11.el8_10.1 |
+73
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 |
|---|---|---|
| almalinux:xmlrpc-c | 1.51.0-17.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:xmlrpc-c-c++ | 1.51.0-17.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:xmlrpc-c-client | 1.51.0-17.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:xmlrpc-c-client++ | 1.51.0-17.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:xmlrpc-c-devel | 1.51.0-17.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| opensuse:xmlrpc-c | 1.64.03-2.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:xmlrpc-c | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-apps | 0:1.32.5-1905.svn2451.el7_9.1 · Red Hat:rhel_els:7 | Package registry (OSV) |
| red hat:xmlrpc-c-apps-debuginfo | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-c++ | 0:1.32.5-1905.svn2451.el7_9.1 · Red Hat:rhel_els:7 | Package registry (OSV) |
| red hat:xmlrpc-c-c++-debuginfo | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-client | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-client-debuginfo | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-client++ | 0:1.32.5-1905.svn2451.el7_9.1 · Red Hat:rhel_els:7 | Package registry (OSV) |
| red hat:xmlrpc-c-client++-debuginfo | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-debuginfo | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-debugsource | 0:1.51.0-16.el9_2.1 · Red Hat:rhel_e4s:9.2::appstream | Package registry (OSV) |
| red hat:xmlrpc-c-devel | 0:1.32.5-1905.svn2451.el7_9.1 · Red Hat:rhel_els:7 | Package registry (OSV) |
| rocky linux:xmlrpc-c | 0:1.51.0-17.el9_8 · Rocky Linux:9 | Package registry (OSV) |
| suse:xmlrpc-c | 1.54.06-160000.3.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
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.
No dated events beyond publication.
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.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
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
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- A
- Scope
- X
Weakness class (CWE)
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Root cause
User content is inserted into the page as HTML. The browser interprets the content as code rather than data.
The bug in code
The whole CWE-79 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
commentEl.innerHTML = comment.body;Fixed
commentEl.textContent = comment.body;Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; 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 helpChange log
- Fix✗ → ✓
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References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.