CVE-2026-129140

paicoding 1.0.0 through 1.0.3 Stored XSS via SVG Image Upload

Published Nov 13, 2026 CVSS 4.0 · 5.1 Medium EPSS n/a KEV · Not listed

Description

paicoding 1.0.0 through 1.0.3 contains a stored cross-site scripting vulnerability in image upload because ImageServiceImpl.validateStaticImg accepts SVG files, which are then served from the site origin when local storage is used. Authenticated attackers can upload script-bearing SVG images that execute when victims view them, stealing the non-HttpOnly f-session cookie to hijack accounts.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

itwanger

paicoding

unaffected

Version	Status	Constraints
`1.0.0`	affected	≤ 1.0.3

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/itwanger/paicoding/blob/903adce70309d340f7eec51ec3c80cfe3c8326c1/paicoding-service/src/main/java/com/github/paicoding/forum/service/image/service/ImageServiceImpl.java#L174-L180
https://github.com/itwanger/paicoding/issues/137
https://vul.yulun.ac.cn/20261112/paicoding/
https://www.vulncheck.com/advisories/paicoding-1.0.0-through-1.0.3-stored-xss-via-svg-image-upload

History

Nov 13, 2026 5:30 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		paicoding 1.0.0 through 1.0.3 contains a stored cross-site scripting vulnerability in image upload because ImageServiceImpl.validateStaticImg accepts SVG files, which are then served from the site origin when local storage is used. Authenticated attackers can upload script-bearing SVG images that execute when victims view them, stealing the non-HttpOnly f-session cookie to hijack accounts.
Title		paicoding 1.0.0 through 1.0.3 Stored XSS via SVG Image Upload
First Time appeared		Itwanger Itwanger paicoding
Weaknesses		CWE-79
CPEs		cpe:2.3:a:itwanger:paicoding::::::::
Vendors & Products		Itwanger Itwanger paicoding
References		https://github.com/itwanger/paicoding/blob/903adce70309d340f7eec51ec3c80cfe3c8326c1/paicoding-service/src/main/java/com/github/paicoding/forum/service/image/service/ImageServiceImpl.java#L174-L180 https://github.com/itwanger/paicoding/issues/137 https://vul.yulun.ac.cn/20261112/paicoding/ https://www.vulncheck.com/advisories/paicoding-1.0.0-through-1.0.3-stored-xss-via-svg-image-upload
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}` cvssV4_0 `{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}`