Yaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with /%5C../ to port 8080
Published Jul 7, 2017
7.5
HIGHCVSS 3.0
EPSS 81.16%
Description
Yaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with /%5C../ to port 8080. NOTE: this CVE is only about use of an initial /%5C sequence to defeat traversal protection mechanisms; the initial /%5C sequence was apparently not discussed in earlier research on this product.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (29 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 81.16% (0.81159) | 99.63th | v5 (v2026.06.15) |
| Sep 22, 2026 | 81.16% (0.81159) | 99.62th | v5 (v2026.06.15) |
| Sep 21, 2026 | 54.64% (0.54643) | 99.00th | v5 (v2026.06.15) |
| Sep 6, 2026 | 81.16% (0.81159) | 99.61th | v5 (v2026.06.15) |
| Sep 5, 2026 | 54.64% (0.54643) | 98.97th | v5 (v2026.06.15) |
| Aug 30, 2026 | 81.16% (0.81159) | 99.61th | v5 (v2026.06.15) |
| Aug 28, 2026 | 54.64% (0.54643) | 98.97th | v5 (v2026.06.15) |
| Aug 24, 2026 | 81.16% (0.81159) | 99.60th | v5 (v2026.06.15) |
| Aug 23, 2026 | 54.64% (0.54643) | 98.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 81.03% (0.81028) | 99.58th | v5 (v2026.06.15) |
| May 29, 2026 | 91.28% (0.91277) | 99.67th | v4 (v2025.03.14) |
| Jan 9, 2026 | 89.55% (0.89548) | 99.53th | v4 (v2025.03.14) |
| Mar 26, 2025 | 91.46% (0.91457) | 99.66th | v4 (v2025.03.14) |
| Mar 24, 2025 | 88.68% (0.88683) | 99.50th | v4 (v2025.03.14) |
| Mar 23, 2025 | 91.46% (0.91457) | 99.66th | v4 (v2025.03.14) |
| Mar 20, 2025 | 88.68% (0.88683) | 99.51th | v4 (v2025.03.14) |
| Mar 19, 2025 | 91.46% (0.91457) | 99.66th | v4 (v2025.03.14) |
| Mar 18, 2025 | 88.68% (0.88683) | 99.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 91.46% (0.91457) | 99.66th | v4 (v2025.03.14) |
| Dec 17, 2024 | 91.64% (0.91638) | 99.15th | v3 (v2023.03.01) |
| Apr 22, 2023 | 96.16% (0.96161) | 99.19th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.56% (0.96560) | 99.29th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.38% (0.08382) | 93.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.38% (0.08382) | 93.35th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.38% (0.08382) | 82.62th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Sep 1, 2021 | 3.63% (0.03630) | 82.60th | v1 |
| Apr 14, 2021 | 3.63% (0.03630) | 0.00th | v1 |
References (3)
- http://hyp3rlinx.altervista.org/advisories/YAWS-WEB-SERVER-v1.91-UNAUTHENTICATED-REMOTE-FILE-DISCLOSURE.txt x_refsource_MISCExploitThird Party Advisory
- http://www.securityfocus.com/bid/99515 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://www.exploit-db.com/exploits/42303/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://hyp3rlinx.altervista.org/advisories/YAWS-WEB-SERVER-v1.91-UNAUTHENTICATED-REMOTE-FILE-DISCLOSURE.txt | x_refsource_MISCExploitThird Party Advisory | |
| http://www.securityfocus.com/bid/99515 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://www.exploit-db.com/exploits/42303/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.